A. Blömer, Die reformierte Familie Gietmann (Gethmann) aus Monheim und Hilden, Mönchengladbach 1996, S. 17 f.
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Johann Wilhelm GETHMANN | _______________________
| (1734-1819)x1760 | |
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|--Johann Diedrich GETHMANN
| (1763-....)x1813 _______________________
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| ______________________|_______________________
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| Johannes URDENBACH | _______________________
| | (1710-1744)x1737 | |
| | |______________________|_______________________
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| Anna Katharina URDENBACH |
(1741-1803)x1760 | Johannes HALFMANN
| | (....-1707)x1666
| Diedrich HALFMANN | Elisabeth CLEVENHAUS >
| | (1680-1718)x1707 (1645-1707)
| Anna Christina HALFMANN |
(1710-1758)x1737 | Peter TILLMANS >
| | x1686
| Anna Maria TILLMANS | Katharina KIRBERG >
(1687-1712)x1707 (1655-1713)