St is a boy name. It last appeared in U.S. Social Security records in 2005. St first appears in the data in 1919 and reached its peak in 1920 (8 births). The chart below shows how the name has risen and fallen over time.
How popular is St? (U.S. births per year)
U.S. births per year, 1919–2005 · hover or tap for the count and national rank · source: U.S. Social Security Administration