Paddy Family History

English (Cornwall): patronymic perhaps from a pet form of the Cornish saint's name Petrock used as a personal name in Cornwall in the 16th century usually in the form Petherick (Middle Cornish Pedrek).

See also Patey. Alternatively the name in Cornwall could be English and belong with English: perhaps from an unrecorded Middle English personal name Paddy which could be a variant of Patey (pet form of Patrick)

or alternatively a pet form of Middle English Padde with the Middle English hypocoristic suffix -y.