When Alfons Constant Janssens was born on 12 March 1850, in Overmere, East Flanders, Belgium, his father, Pieter Francies Janssens, was 41 and his mother, Sophia Vaele, was 30. He married Ida Verdonck on 28 March 1883, in Berlare, East Flanders, Belgium. They were the parents of at least 4 sons and 2 daughters. He died on 11 January 1927, in Berlare, East Flanders, Belgium, at the age of 76.
Some characteristic forenames: French Amedee, Andre, Florent, Gaetan, Jacques, Luc, Monique, Pierre, Thierry. German Ilse, Wieland.
Flemish, Dutch, and North German: from the genitive form of Janssen , meaning ‘Jan's son's son’. The surname of Flemish origin is also common in the Walloon part of Belgium.
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