(English) Form of Gillian, meaning “one who is youthful” Jilian, Jiliana, Jillaine, Jillan, Jillana, Jillane, Jillanne, Jillayne, Jillene, Jillesa, Jilliana, Jilliane, Jilliann, Jillianna, Jillianne, Jillyan, Jillyanna, Jillyanne, Jyllina Health Source: Medical Dictionary Author: Health Dictionary