Willisha is of African origin, derived from the Swahili word "willishe", which means "happy". It is a unisex name but is more commonly used for girls. The name gained popularity in recent years due to its unique sound and positive meaning.
"Willisha appears to have seen its peak popularity between 1988 and 1994, with 7 or more births each year during this period. However, it seems the name's usage has been declining since then, with only 5 or fewer births recorded in each subsequent year until 2000."