Adrienne Léonie Pauline Emilie Caroline Janssen 1897–1973 Emmanuel Charles Marie Constant Janssen 1879–1955 | | |
| | Albert Auguste Léon Joseph Gustave Janssen 1872–1921 Henriette Julie Charlotte Halot 1874–1934 | | |
| | Gérard Hubert Léon Janssen 1849–1923 Caroline Anne Julie Françoise Bourgeois 1851–1926 | | |
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