She is married to Johann Heinrich Robben.
They got married on August 25, 1903 at Altharen, Haren (Ems), Landkreis Emsland, Lower Saxony, Germany, she was 25 years old.Source 2
Witness: Robben Wilhelm Haussohn zu Altharen Tübben geboren Maag Margaretha Kleidermachersfrau zu Köln
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Maria Catharina Maag | ||||||||||||||||||||||||||||||||||
1903 | ||||||||||||||||||||||||||||||||||
Johann Heinrich Robben | ||||||||||||||||||||||||||||||||||

Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I45895.php
9 Robben Johann Heinrich Schneidermeister zu Altharen 18790729 Altharen Robben Hermann Heinrich Schulte Anna Gesina Gemeindediener Maag Maria Catharina Kleidermacherin zu Altharen 18780222 Haren Maag Heinrich Schnieders Adelheid Zimmermann Altharen 19030825