Killua is a boy name. In 2025 it ranked #13491 for boy births in the United States, given to 14 babies. Killua first appears in the data in 2019 and reached its peak in 2023 (27 births). The chart below shows how the name has risen and fallen over time.
How popular is Killua? (U.S. births per year)
U.S. births per year, 2019–2025 · hover or tap for the count and national rank · source: U.S. Social Security Administration