(1) He is married to Catharina Gertrudis Elizabeth Reker.
They got married on April 21, 1900 at Onstwedde, Groningen, he was 27 years old.Source 3
(2) He is married to Helena Antoinetta Leeuw.
They got married on November 25, 1912 at Borger, Drenthe, he was 40 years old.Source 4
ouders Gerhardus Lukken, arbeider en Maria Catharina Ridders (bron huw akte)