In het huwelijkscontract van Willem Jans en Anje Derx van 3 juli 1750 wordt zij aangeduid als Tonniske Duirts. Tonniske is een "snaarske" (= zwagersvrouw) van de bruid Anje Derx.
When copying data from this family tree, please include a reference to the origin: Klaas Pera, "Mennonites from Groningen", database, Genealogy Online (https://www.genealogieonline.nl/groningse-doopsgezinden/I18936.php : accessed August 8, 2025), "Tonje Duirts".
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