Jillan is of American origin, meaning "youthful," derived from the English word "jolly." It is often used as a feminine given name but can also be used for males due to its unisex nature. The name Jillan has been growing in popularity since the late 20th century and has gained recognition worldwide.
Jillian is a unique and uncommon name with only 5 births recorded each in 1983 and 1985, totaling 10 births over those two years.