When copying data from this family tree, please include a reference to the origin: Andre Ottenhoff, "Family tree Ottenhoff - Schilder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ottenhoff/I26205.php : accessed January 4, 2026), "Waltbert II van Graingau (± 810-± 872)".
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