E. Strutz, Die Ahnentafeln der Elberfelder Bürgermeister und Stadtrichter, Neustadt/Aisch ²1963, S. 16, 28, 199
__ | __|__ | Rütger KREY | __ | x1600 | | | |__|__ | Johannes KREY | __ | (1600-1655) | | | | __|__ | | | | | Katharina FORTMANN | __ | x1600 | | | |__|__ |--Peter KREY | (1630-1688)x1673 __ | | | __|__ | | | _____________________| __ | | | | | | |__|__ | | | Gertrud HENCKEL | __ | | | __|__ | | |_____________________| __ | | |__|__