Louis Slier was a son of Jonas Slier and Anna Plas. He married Elisabeth Aluin in 1939 in Amsterdam.
Stadsarchief Amsterdam, archiefkaart Louis Slier.
Louis Slier and his wife Elisabeth Aluin had a vendor permit for the Westerstraat market in Amsterdam. Before that, Louis Slier sold goods at the Nieuwmarkt in Amsterdam with his parents.
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