Kellieann is of Irish origin, derived from the ancient name Cillí, which means 'devoted to God'. The name gained popularity in the United States during the mid-20th century and has since been favored by parents seeking a unique yet approachable name for their daughters.
"Kellieann experienced a spike in popularity during the late 1960s with 7 births each in 1965 and 1969, followed by a steady decline until it reached its lowest point in 1983 with only 5 births. It saw another peak in 1991 with 8 births but has since remained relatively stable, fluctuating between 5 and 7 births annually."