Gillian Family History
Gillian Name 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