Killien is a boy name. It last appeared in U.S. Social Security records in 2016. Killien first appears in the data in 2016 and reached its peak in 2016 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Killien? (U.S. births per year)
U.S. births per year, 2016–2016 · hover or tap for the count and national rank · source: U.S. Social Security Administration