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Male Guelph Marin av Altdorf (Welfo av Altdorf) Click to view Guelph Marin av Altdorf in the family tree

Guelph was born in 0630 in Altdorf, Germany.1   Guelph's father was Cathicus Boniface of Guelph and his mother was <Unknown>.  His paternal grandparents were Caduinus the Welf and <Unknown>.  He was an only child.  He died at the age of 43 in 0673.1 

Family Details of Guelph's family with <Unknown>

Further source/citation:

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