"New York, Births and Christenings, 1640-1962," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/V2CS-PFW : accessed 23 Dec 2012), Willem Klerk in entry for Willem Klerk, 24 May 1761; citing reference , FHL microfilm 534199 father's name: Willem Klerk, mother's name: Lisabeth Decker
