http://fmg.ac/Projects/MedLands/THURINGIAN%20NOBILITY.htm#OttoWeimardied1067 Caw...

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http://fmg.ac/Projects/MedLands/THURINGIAN%20NOBILITY.htm#OttoWeimardied1067 Cawley, Charles. Medieval Lands: A Prosopography of Medieval European Noble and Royal Families, Online at Foundation for Medieval Genealogy Website (accessed 2020).

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