Vermeld in de ridderschap van het kwartier Nijmegen (1376-1396). Hij zegelt op 2 nov 1376 een zoenbrief tussen Heeckerens en Bronkhorsten; hij zegelt op 6 jan 1377 de landvrede onder de ridders en knapen.
stamvader van het adelijke geslacht Isendoorn (a Blois)
When copying data from this family tree, please include a reference to the origin: Fred Bergman, "Genealogische database BergSmit", database, Genealogy Online (https://www.genealogieonline.nl/database-bergsmit/I4558.php : accessed May 4, 2025), "Alard van ISENDOORN (± 1340-± 1410)".
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