C. O. Langen, Chronik der Familie Johann Jakob Langen in Köln, Mönchengladbach 1899, S. 67, 72
_____________________________ | ___________________________|_____________________________ | ___________________________| _____________________________ | | | | |___________________________|_____________________________ | Friedrich MAAS | _____________________________ | (1817-1859)x1856 | | | | ___________________________|_____________________________ | | | | |___________________________| _____________________________ | | | | |___________________________|_____________________________ |--Caroline Auguste MAAS | (1856-1882)x1875 Johannes BOCKMÜHL > | | (1711-1783)x1747 | Johann Heinrich BOCKMÜHL | Maria Katharina NORRENBERG > | | (1761-1802)x1790 (1723-1806) | Johann Heinrich BOCKMÜHL | | | (1791-....)x1825 | Johann Caspar HÜLSBERG > | | | | (1731-1799)x1765 | | | Maria Magdalena HÜLSBERG | Katharina Elisabeth MÄHLER > | | (1769-1848)x1790 (1740-....) | Augusta BOCKMÜHL | _____________________________ (1827-....)x1856 | | | ___________________________|_____________________________ | | | ECKERT | _____________________________ x1825 | | |___________________________|_____________________________