Notes about Gerardus van Heinsberg (Heer van Gen hoes oud Valkenburg 1241)
Het leen Valkenburg werd al genoemd in 1041 toen het geschonken werd aan ene Grandpré. Later, rond 1100, kwam het in handen van Thibald van Valkenburg van het nieuwe stamslot Valkenburg.
When copying data from this family tree, please include a reference to the origin: Ger de Vries, "Family tree I.D.M. de Vries", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-i-m-d-de-vries/I38163.php : accessed June 14, 2024), "Gerardus van Heinsberg (Heer van Gen hoes oud Valkenburg 1241) (± 1178-> 1241)".
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