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Padre de Count Siegfried I von Sponheim, Graf im Pustertal; Stephan I von Sponheim, Graf von Sponheim and Mathilde de Sponheim
Hermano de: Hartwig IV Von Pottenstein; Chadaloh (iii) im Isengau, Graf; Aribo Von Mainz; Wichburg Von Bavaria; Hildburg Von Bavaria; and Kunigunde Von Bavaria
Medio Hermano de: unknown Von Chiemgau; Sieghard VII Graf von Ebersburg; Engelbert IV, Graf im Inngau and Berenger Pfalzgraf im bayerischen Nordgau, I
He was an East Frankish Count. He was probably established in southeastern Germany by the Emperor Conrad II, and became Count of Lisbon.
http://en.wikipedia.org/wiki/Siegfried_I,_Count_of_Sponheim
About his parents little is known. It has been noticed however, that his father was Eberhard I of Sponheim (d. 1044) and that he therefore had brothers named Friedrich of Sponheim (10221058) and Eberhard II of Sponheim.[citation needed]
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Everhard was an east Frank.
Speculative research of Rob Salzman
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http://freepages.genealogy.rootsweb.com/~lzrslong/b1449.htm#P182042
I EBERHARD Graf Von Sponheim7,368,370 died in 1065.368 Parents: ARIBO Pfalzgraf In Bayern and Adela Von BAYERN.