When copying data from this family tree, please include a reference to the origin: M F Koeman, "Family tree Koeman Vlam", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koeman-vlam/I509151.php : accessed September 23, 2024), "Agnes (Sophia) van Montbelliard-Altena (1128-1180)".
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