Fooke Janssen Rüstmann, son of Johann Heien Rüstmann and Trienke Claassen , was born on 3 April, 1837, in Folstenhausen, Stedesdorf, Ostfriesland, and died in 1879, at age 42.

Fooke Janssen married Gretke Drost in 1863, in Ardorf, Ostfriesland. Gretke was born on 20 April, 1814, in Schnapp, Leerhafe, Ostfriesland, and died on 3 June, 1896, in Ardorf, Ostfriesland, at age 82.