A large sea duck
Derived from the Old Norse word 'æðr', referring to the eider duck known for its soft down feathers. In Basque culture, it is also used as a name meaning 'beautiful', though it is more commonly feminine in that context.
About 204 boys were named Eider in 2025.
US births per 5-year period, 1990–present (SSA data).
Olympic race walker and world champion
