This is a disambiguation page for "Eider". By "Eider", you might mean:
- Eider Duck, Donald Duck's falcon-raising uncle, identified in Don Rosa's Duck Family Tree as the father of Donald's cousins Fethry and Whitewater;
- Eider, Elvira Duck's uncle, mentioned in the 1972 Carl Barks-written story Gold of the '49ers;
- Aunt Eider, Scrooge McDuck's recurring busybody aunt;
- Sir Eider McDuck, the historical member of Clan McDuck.
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