- GN 1990 Karel de Grote Nummer;; GN 1990 Karel de Grote Nummer
- kwartierstatenboek Prometheus XIII;; kwartierstatenboek Prometheus XIII
- Dek, dr. A.W.E.: genealogie der graven van Holland, 's Gravenhage, 1954;; Dek, dr. A.W.E.: genealogie der graven van Holland, 's Gravenhage, 1954
- Karel de Grote site reeks 002 Van der Meijden; - kwartierstatenboek Prometheus XIII;; kwartierstatenboek Prometheus XIII; - Kwartierstaat Neeltje Adriana Kranenburg; - Karel de Grote site reeks 105 van Ditzhuijzen; - Kwartierstaat van Schothorst - www.nikhef.nl/~louk/MESKW
- Dek, dr. A.W.E.: genealogie der graven van Holland, 's Gravenhage, 1954;; Dek, dr. A.W.E.: genealogie der graven van Holland, 's Gravenhage, 1954
When copying data from this family tree, please include a reference to the origin: Ton Deunhouwer, "Family tree Dullemen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-dullemen/I34147.php : accessed June 24, 2024), "Othilhildis van SAKSEN".
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