Allerby is a hamlet in the civil parish of Oughterside and Allerby, Cumbria, England.

Allerby was originally called " 'Ailward's', that is 'Æðelward's, Crosby', afterwards reduced to 'Ailward's bȳ'.

"[1] So, "the village or hamlet of Ailward".

(Bȳ is Old English from the Old Norse býr, meaning 'village' or 'hamlet'.)

This Cumbria location article is a stub.