A. Blömer, Ahnenliste Johann Peter Keller, * 3.4.1935 in Rheydt, Mönchengladbach 1987, S. 99
A. Blömer, Stammfolge der Familie Adams, ursprünglich Schrans, aus Mönchengladbach und Rheydt, Mönchengladbach 2000, S. 5
___________________ | Adam NIEPER |___________________ | (1520-1553) Wilhelm NIEPER | ___________________ | (1545-1583)x1575 | | | | N. |___________________ | Peter NIEPER | | (1575-1640)x1603 | Jakob | | | (1475-....)x1500 | | to JAEPEN | LINDGENS | | | (1510-1583) (1480-....) | | to JAEPEN | ___________________ | (1555-1583)x1575 | | | | N. |___________________ |--Jakob NIEPER | (1610-....)x1636 ___________________ | | | ___________________|___________________ | | | ___________________| ___________________ | | | | | | |___________________|___________________ | | | Sibylla | ___________________ (....-1621)x1603 | | | ___________________|___________________ | | |___________________| ___________________ | | |___________________|___________________