The name of John Crackston, English Separatist residing in Leiden Holland, first appears in Leiden records on June 16, 1616, when, along with future fellow Mayflower passenger Moses Fletcher, they being witnesses to the betrothal of Zachariah Barrow.
Crackston's daughter Anna (Anne) married Thomas Smith in Leiden on December 12, 1618, to which he is also recorded as being a witness.