From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gillian \Gil"li*an\, n. [OE. Gillian, a woman's name, for
Julian, Juliana. Cf. Gill a girl.]
A girl; esp., a wanton; a gill. [Obs.] --Beau. & Fl. Gillie
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gillian \Gil"li*an\, n. [OE. Gillian, a woman's name, for
Julian, Juliana. Cf. Gill a girl.]
A girl; esp., a wanton; a gill. [Obs.] --Beau. & Fl. Gillie