Siegfried I, Count of Sponheim (born c. 1010)

Siegfried I, Count of Sponheim

Margrave of the Hungarian March

Siegfried I is considered the progenitor of the Carinthian ducal House of Sponheim (Spanheimer) and all of its lateral branches, including the Counts of Lebenau and the Counts of Ortenburg. He is documented as Count of Sponheim from 1044 and served as margrave of the Hungarian…