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English: from the Middle English personal name Osbern partly from late Old English Ōsbern an Anglicized form of Old Norse Ásbiǫrn (from áss ‘god’ + biǫrn ‘bear’) but more usually from Norman use of the cognate ancient Germanic Ōsbern. Osbern was often treated as an alternative form of Osbert. For pet forms see Hoskin and Opie . The surname has also been established in Ireland (Waterford Tipperary) since the mid 16th century.
Source: Dictionary of American Family Names 2nd edition, 2022