https://www.wikitree.com/wiki/Von_der_Marck-Arenberg-1 – webtrees

https://www.wikitree.com/wiki/Von_der_Marck-Arenberg-1

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Alive Dead Death>100 Death<=100 Birth>100 Birth<=100 Roots Leaves
Given names	Surname	Sosa	Birth		Place		Death		Age	Place	Last change
Eberhard von der Marck-Arenberg Father: Eberhard von der Marck-Arenberg I Mother: Maria de Looz				about 1374	650	Siegen-Wittgenstein, Arnsberg, Nordrhein-Westfalen, Tyskland	1	October 14, 1440	584	66		Saturday, August 21, 2021 9:50 PM	M	YES	YES
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Both alive Widower Widow Both dead Roots Leaves Not married Marriage>100 Marriage<=100 Divorce Multiple marriages
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