Down is a girl name. It last appeared in U.S. Social Security records in 1970. Down first appears in the data in 1963 and reached its peak in 1966 (7 births). The chart below shows how the name has risen and fallen over time.
How popular is Down? (U.S. births per year)
U.S. births per year, 1963–1970 · hover or tap for the count and national rank · source: U.S. Social Security Administration