Regulo is a boy name. It last appeared in U.S. Social Security records in 2021. Regulo first appears in the data in 1999 and reached its peak in 1999 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Regulo? (U.S. births per year)
U.S. births per year, 1999–2021 · hover or tap for the count and national rank · source: U.S. Social Security Administration