Dutch Genealogy: WieWasWie and the Patronymic Problem

Dutch research goes brilliantly for about six generations and then hits a wall in 1811, and almost everyone hits it in the same place for the same reason. Before 1811 a large share of the Dutch population had no fixed surname at all — a person was Jan Pietersz, meaning Jan son of Pieter, and his son was Pieter Jansz. Napoleon's decree required everyone to register a permanent family name, and the resulting naamsaanneming registers survive: lists of men declaring the name they had chosen, with their children named and aged. That single record set is the bridge across 1811. Everything above it is easy, because the Dutch have put an enormous amount online free. Once the households start branching, the cousin calculator will tell you what everyone is to everyone.

Civil registration: the easy part

Dutch civil registration (burgerlijke stand) began in 1811 for most of the country, earlier in the areas France annexed first — parts of Limburg and Zeeland-Flanders from the late 1790s.

The records are detailed and consistent. A birth act names the child, the date and hour, the father with his occupation and age, the mother with her maiden name and age, and two witnesses. A marriage act names both parties with ages, birthplaces and occupations, and both sets of parents, stating which are deceased.

Dutch marriage files are the bonus round. Alongside the marriage act itself, the registrar kept a huwelijksbijlagen file — the supporting documents. That file can contain the couple's birth or baptism extracts, death certificates for deceased parents, military service certificates and parental consent statements. It is frequently the single richest folder in Dutch genealogy, and much of it is scanned.

Access follows an age rule. Birth records generally open after 100 years, marriage records after 75, and death records after 50. Anything more recent stays with the municipality.

The scans are largely free. Dutch regional and municipal archives have digitized heavily and publish images at no cost, and WieWasWie links straight through to them.

WieWasWie and the other free portals

WieWasWie is the front door. It draws indexes from archives across the country into one search, and each result names the archive that holds the original so you can click through to the scan.

Open Archives is the one people forget. It aggregates a different, sometimes larger set of sources, including many volunteer indexes, and it is free. If WieWasWie returns nothing, try it before concluding the record does not exist.

Regional archives are where the images live. Gelders Archief, Zeeuws Archief, BHIC in Brabant, Drents Archief, Tresoar in Friesland and the Amsterdam city archive all publish free scans, and each has its own search that is sometimes better than the national aggregator for its own territory.

Delpher is a genuine research tool, not a curiosity. Dutch families placed familieberichten — birth, engagement, marriage, anniversary and death announcements — in newspapers, and they name relatives explicitly: "also on behalf of her children and grandchildren", followed by a list. Our guide to searching free digitized newspapers covers the general technique.

The bevolkingsregister: a household on a page

From 1850 Dutch municipalities kept population registers, a continuous record of who lived in each household rather than a snapshot.

One page holds the family. Head of household, spouse, each child, plus servants and lodgers, with everyone's date and place of birth, religion, occupation and marital status.

Movement is recorded both ways. When a person arrived, the register notes the date and where from; when they left, the date and where to. So a family can be chased between municipalities without guessing.

The format evolved. Bound registers ran to about 1920, then gezinskaarten — family cards, one per household — covered roughly 1920 to 1939, and after 1939 persoonskaarten, one card per individual, took over. The personal cards are held by the CBG and ordered for a fee; they are the standard route to twentieth-century Dutch relatives.

Religion is on the page, and it matters. Knowing whether the family were Dutch Reformed, Catholic, Mennonite or Jewish tells you which church books to open for the pre-1811 generations. Our church records guide explains how to trace a congregation's registers.

Before 1811: the DTB books

DTB stands for doop-, trouw- en begraafboeken — baptism, marriage and burial books — kept by churches, mostly from the 1600s and in some places the late 1500s.

Dutch Reformed registers are the largest set, because the Reformed Church was the public church of the Republic. Catholic, Mennonite, Lutheran, Remonstrant and Jewish congregations kept their own, and these survive unevenly.

Marriage often has a civil twin. Under the Republic, couples could marry before the local magistrates (schepenen) as well as, or instead of, in church, and marriage intentions (ondertrouw) were registered publicly. So a missing church marriage may exist as a civil one.

Baptism entries name the witnesses, and Dutch baptismal witnesses were overwhelmingly grandparents, aunts and uncles. In a patronymic world where surnames give you nothing, the witnesses are how you reconstruct a family.

Burial records may be about money rather than people. Many Dutch burial registers are church accounts recording the fee, the grave and who paid — sometimes naming only "child of Jan Pietersz". Frustrating, but the payer is usually a relative.

The patronymic problem, and how 1811 solves it

Before 1811, a huge share of the Dutch population used patronymics rather than surnames. Jan, son of Pieter, was Jan Pietersz or Jan Pieterszoon. His daughter was Aaltje Jansdr. Every generation the second name changed.

Some regions were worse than others. Patronymics persisted longest in Friesland, Groningen and Drenthe; families in the cities and in Holland had adopted fixed surnames much earlier, sometimes by the 1500s.

Napoleon's decree of 1811 required a fixed family name. Heads of household went to the town hall and declared one, and the clerk wrote it in a register van naamsaanneming: the man's chosen surname, his existing name, and his children and grandchildren with their ages.

That register is the crossing point. It links a family known by a modern surname to the same people known by patronymics before 1811, with ages that lead you to their baptisms. Many of these registers are indexed and scanned free.

The joke-name story is mostly a myth. You will hear that Dutch families chose absurd surnames — Naaktgeboren, Poepjes, Zeldenthuis — to mock a decree they expected to be temporary. Most of those names are documented well before 1811 and are ordinary nicknames or place names. Take the story as folklore, not history.

Where the chosen name came from varies. Many froze the current patronymic (Jansen, Pietersen). Others took a farm or place (van der Meer, van Dijk), a trade (Bakker, Smit, Mulder), or a physical or personal nickname (de Groot, de Jong, de Wit). Our guides to patronymic surnames and to working out where a surname comes from cover the wider pattern.

Search techniques that make Dutch records work

Ignore the particle when searching. Dutch indexes alphabetise on the main element, so "van der Berg" is filed under B and "de Vries" under V. Enter Berg or Vries in the surname field, and put van der or de in a prefix field if one exists.

Patronymic suffixes are interchangeable. Pietersz, Pieterszoon, Pieters and Pieterse are the same name. Jansdr, Jansdochter and Jans likewise. Search the stem.

Spelling was never standardised. The same family is Kuiper, Kuijper and Cuyper across three generations, and ij and y swap freely. Our guide to surname spelling variations covers the searching strategy.

Given names have formal and everyday forms. A woman baptised Aaltje appears as Aaldje, Alida and Aleida. A man baptised Cornelis is Kees at home and Cornelius in Latin registers.

Dutch emigration went in waves. The seventeenth-century colonial migration to New Netherland, a major nineteenth-century religious emigration to Michigan, Iowa and Wisconsin, and a large post-1945 movement to Canada, Australia and New Zealand. The crossing method is covered in our free immigration records guide — and note that Dutch emigrants to America often reverted to patronymic-style naming on arrival, or had a particle merged into the surname as Vandenberg or Vanderveen.

Use dates, not names, to identify people. As in Scandinavia, the reliable identifier is the birth date and place recorded in the population register, which follows a person for life. When you are trying to confirm that two entries are the same family, the stated relationships plus the dates are what settle it — and the relationship calculator will label the connection once you have it.

FAQ

Is WieWasWie free?

Searching WieWasWie is free, and results link through to the archive holding the original. A free account and a paid tier add extras such as saved searches and some enhanced access, but the core index of Dutch births, marriages and deaths costs nothing to search.

When did the Netherlands start civil registration?

In 1811 for most of the country, and from the late 1790s in the areas France annexed earliest, including parts of Limburg and Zeeland-Flanders. Before that date the church DTB books — baptism, marriage and burial registers — serve as the vital records.

Why did my Dutch ancestors have no surname before 1811?

Much of the Dutch population used patronymics instead: Jan Pietersz meant Jan, son of Pieter, and the name changed every generation. Napoleon's 1811 decree required a permanent family name, recorded in name adoption registers that list the man and his children.

What is a bevolkingsregister?

The Dutch population register, kept by municipalities from 1850. It records each household on one page with every member's birth date and place, religion and occupation, plus the date and place of every arrival and departure — effectively a continuously updated census.

Did Dutch families really pick joke surnames in 1811?

Mostly no. The story that families chose absurd names expecting the decree to be reversed is folklore. Names such as Naaktgeboren and Poepjes are documented well before 1811 and are ordinary nicknames or place names that only sound strange to modern ears.

Why does my Dutch surname search return nothing?

Usually because of the particle. Dutch indexes alphabetise "van der Berg" under B and "de Vries" under V, so entering the full string fails. Search the main element alone, and try spelling variants — ij and y, and Kuiper against Kuijper — as well.

Crossing the 1811 line

Dutch genealogy is generous right up to the moment it stops being generous, and the stopping point has a name. Work down from WieWasWie and the population registers while the surnames behave, collect the marriage supplement files because they carry documents you would otherwise pay for, then find the 1811 name adoption register for the municipality and use it to convert your family into its patronymic form. From there the DTB books, the baptismal witnesses and the marriage intentions carry you back into the 1600s. Search on the main element of the name, never the particle, and trust birth dates over spellings. When the family fans out across Friesland, Michigan and Ontario, the free CousinChart relationship calculator will tell you exactly how the branches connect.