Siegfried I may refer to:

• Siegfried of Luxembourg (922–998), first count of Luxembourg
• Siegfried I, Count of Sponheim (c. 1010 – 1065)
• Siegfried I (Archbishop of Mainz) (died 1084)
• Siegfried I, Prince of Anhalt-Zerbst (c. 1230 – 1298)

Topics referred to by the same term

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