Jillisa is a unique and melodic first name of unknown origin, perhaps a blend of popular names like Jessica and Lisa. It gained popularity in the United States during the late 20th century but remains relatively rare, making it distinctive. The name Jillisa consists of three syllables and is pronounced as /jɪlˈɪsə/. There are no known variations or nicknames for this name, allowing Jillisa to stand alone in its uniqueness. As a given name, Jillisa has been used 608 times since 1973 according to Social Security data in the U.S., with its peak usage occurring in 1992 when it was given to 54 newborn girls.
"The name Jillisa experienced a surge in popularity during the late 80s and early 90s, with the highest number of births occurring in 1989 (21) and 1991 (20). However, it remained relatively uncommon throughout most of the other years, with fewer than 8 births annually from 1971 to 1994."