The story
- Medieval Latin · derived fromavis praedae“bird of prey”
- Anglo-Norman · derived fromospriet
- Middle English · inherited fromospray
- English todayosprey
From Late Middle English ospray, from Anglo-Norman ospriet, from Medieval Latin avis praedae (“bird of prey”), a generic term apparently confused with this specific bird in Old French on its similarity to ossifrage.
Etymology from Wiktionary, CC BY-SA 4.0.