Jillian \j(il)-lian\ as a girl's name is pronounced JIL-ee-an. Variant of Gillian, from Julian; diminutive of Juliana (Latin) "youthful". See also Jill.

Jillian has 19 variant forms: Jilian, Jiliana, Jillaine, Jillan, Jillana, Jillane, Jillanne, Jillayne, Jillene, Jillesa, Jilliana, Jilliane, Jilliann, Jillianna, Jillianne, Jillyan, Jillyanna, Jillyanne and Jyllina.

Baby names that sound like Jillian are Jyllian, Aillin, Gillan, Gilian, Ghillian, Julliana, Jiuliana and Jilleen.