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 |--Adolfina HARTWECK | (1847-1930)x1867 __ | | | _____________________________|__ | | | Heinrich Ludwig FRONING | __ | | x1817 | | | | |_____________________________|__ | | | Luisa Wilhelmina Friederika Theodora FRONING | __ (1820-....)x1842 | | | _____________________________|__ | | | Christina Wilhelmina Theodora ZIMMERMANN | __ x1817 | | |_____________________________|__