Osmo is a boy name. It last appeared in U.S. Social Security records in 1917. Osmo first appears in the data in 1915 and reached its peak in 1915 (7 births). The chart below shows how the name has risen and fallen over time.
How popular is Osmo? (U.S. births per year)
U.S. births per year, 1915–1917 · hover or tap for the count and national rank · source: U.S. Social Security Administration