A. Blömer, Die frühen Generationen der Kelzenberg-Jüchener Familie Keysers, Mönchengladbach 2010, S. 16
__ | ___________________|__ | ____________________| __ | | | | |___________________|__ | Nikolaus KEYSER | __ | (1645-1724)x1682 | | | | ___________________|__ | | | | |____________________| __ | | | | |___________________|__ |--Cäcilia KEYSER | (1689-....) __ | | | ___________________|__ | | | Johannes KLOETERS | __ | | x1655 | | | | |___________________|__ | | | Katharina KLOETERS | __ (1655-....)x1682 | | | Johann MUNDT |__ | | x1628 | Sophia MUNDT | __ (1632-....)x1655 | | | Güdgen WINTZEN |__ x1628