Gillian Family History
Gillian Surname Meaning
English: from the Middle English and Old French male and female personal names Gillian, Gilion, Jilian, Gelian, all vernacular forms of Latin Julianus and Juliana (see Julian).
Irish (Antrim): shortened Anglicized form of Gaelic Mac Gileáin ‘son of Gileán’, a variant of the personal name Gealán, from a diminutive of geal ‘bright, white’.
Source: Dictionary of American Family Names 2nd edition, 2022
