| | Pierre Leo Antonie "Pierre" Janssen 1926–2007 | | | | Pierre Leo Antonie Janssen 1888–1936 Maria Catharina van Strien 1890– | | | | Johannes Hendrikus Janssen 1854–1897 Cornelia Maria Janssen 1856–1911 | | | | Johannes Henricus Janssen 1804–1871 Cornelia Geutjes 1818–1897 | | | | Arnoldus Geutjes 1776–1860 Catharina Niesmans 1781–1859 | | |
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