Jonathan Jacob Meijer is a Dutch sperm donor featured in Netflix’s 2024 three-part limited series The Man with 1,000 Kids. The title is not a verified count: a 2023 court case established a minimum of 550 children, and Meijer later said 550 was the number he knew for sure. The total remains unsettled in the available reporting.
Who is Jonathan Meijer?
Meijer is a Dutch sperm donor whose donations across multiple settings became the focus of a dispute involving donor-conceived children and their families. Netflix’s series follows families who learned that their donor had children in different parts of the world. The series is a three-episode limited series released in 2024, according to Netflix’s official coverage.
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How many children does Jonathan Meijer have?
There is no confirmed final worldwide total in the available reporting. The Hague court case settled on a minimum of 550 children; it did not establish that 550 was the full count. Meijer said on Dutch talk show Eva in September 2024: “Five hundred and fifty, that’s the number I know for sure. Anything above that is just speculation.” That is his account of what he knows, not an independently verified total. Deutsche Welle’s report on the court case also describes the number as a minimum.
The documentary’s title uses “1,000,” but neither that figure nor the higher estimates discussed in the series should be treated as an established count. Meijer disputed the larger estimate reported in the documentary and said in September 2024 that he intended to sue Netflix, according to DW. The careful distinction is between the court-reported minimum, Meijer’s statement about his own knowledge, and the documentary’s framing.
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What did the Dutch court order?
In 2023, a court in The Hague ordered Meijer to stop donating sperm. DW reported that the order allowed a fine of up to €100,000 for each violation. The court case settled on a minimum of 550 children and reported that Meijer had misinformed families about prior donations.
The court considered it “sufficiently plausible” that an unusually large network of half-siblings could have psychosocial effects, including identity problems and fears of accidental incest. These are risk concerns cited in the legal reporting, not proof that every donor-conceived child experiences those outcomes.
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How does the case fit Dutch donor limits?
The limits and registry described below apply to the Netherlands; they should not be mistaken for a worldwide rule. The Guardian reported in April 2025 that Dutch rules had set a 25-child maximum since 1992 and lowered it to 12 in 2018. Cross-clinic donations and privacy rules made enforcement difficult before a national register became operational retroactively in April 2025. The register uses donor codes intended to prevent sperm from one donor being used for more than 12 conceptions.
Reporting by The Guardian, citing the Dutch gynaecologists’ association NVOG, said that at least 85 donors in the Netherlands had 25 or more children. The same report said Meijer had at least 550 children worldwide, with more than 100 conceived through Dutch clinics. The registry figures describe the Dutch system and its reported findings, not a complete count of all Meijer’s children worldwide.
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Why did the case raise concern?
The scale of the reported half-sibling network was central to the court’s concerns. When one donor has many donor-conceived children, those children may be unaware of their genetic connections; the court identified possible identity-related effects and fear of accidental incest as risks. Those concerns should be understood as reasons for limiting further donations and improving oversight, rather than as a claim that a particular harm has happened to every family.
The case also exposed the difficulty of enforcing limits when donations occur across clinics or outside a single registration system. The Guardian reported that the Netherlands’ national registry became operational only in April 2025, retroactively addressing a system in which prior cross-clinic donations could be hard to track.
What has Meijer said about his donations?
Meijer said he stopped donating in 2019 except to families seeking a second or third child. That is his account as reported by DW, not an independently confirmed description of every donation. He has also disputed the higher estimates associated with the documentary and said the number he knew for sure was 550.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is *The Man with 1,000 Kids*?
Netflix’s 2024 limited series follows families who discovered that their sperm donor had children across the world. The title captures the scale and controversy of the story, but it should not be read as a verified count. The series is a documentary account; its framing, the court-reported minimum, and Meijer’s own statements are distinct sources with different evidentiary weight.
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What are Dutch professionals saying about donor oversight?
In reporting published on 14 April 2025, The Guardian quoted NVOG gynaecologist Marieke Schoonenberg saying, “The number of so-called ‘mass donors’ should be zero,” and, “On behalf of the whole profession, we wish to apologise. We didn’t do things as they should have been done.” The remarks reflect professional criticism of past oversight and the need to prevent similarly large donor networks.
Is there a Jonathan Meijer book?
Leor Literary Agency’s catalog lists L’homme aux 1000 enfants, mon histoire, a French-language memoir by Jonathan Jacob Meijer, published by Favre Editions. The catalog lists ISBN 9782828922979 and a publication date of 19 March 2026. That listing does not establish whether an English edition exists or confirm current retailer stock.
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