Killis is a boy name. It last appeared in U.S. Social Security records in 1905. Killis first appears in the data in 1905 and reached its peak in 1905 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Killis? (U.S. births per year)
U.S. births per year, 1905–1905 · hover or tap for the count and national rank · source: U.S. Social Security Administration