Doop op 6 december 1750 te Amsterdam (Lutherse Kerk)
https://archief.amsterdam/18570NFrv5L1F01/indexen/doopregisters_1564-1811/zoek/query.nl.pl?v1=Margreta Catharina&a1=&d2=6&m2=12&y2=1750
Stadsarchief Amsterdam, DTB 233, p.96(folio 68v), nr.10