E. Strutz, Deutsches Geschlechterbuch 130, Limburg/Lahn 1962, S. 358
__ | __|__ | _____________________________| __ | | | | |__|__ | Giesbert Wilhelm HARTWECK | __ | x1799 | | | | __|__ | | | | |_____________________________| __ | | | | |__|__ |--Ferdinand Heinrich HARTWECK | (1815-....)x1842 __ | | | __|__ | | | Johann Albert ISENBECK | __ | | x1770 | | | | |__|__ | | | Clara Katharina ISENBECK | __ (1772-....)x1799 | | | __|__ | | | Katharina Elisabeth CRÄMER | __ x1770 | | |__|__