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The Mayflower passengers were in Amsterdam for awhile
Many married locals and had children before the voyage:
http://genweb.whipple.org/d0105/I42454.html
Many will find surnames of their ancestors and/or relatives on this genweb site
You can authenticate any Mayflower roots without going through the BS at Mayflower Society websites
That only linked me to one surname...??
My ancestors were Palatine Germans and arrived in Philadelphia on the “Davy” in 1732.