Mailing is a girl name. It last appeared in U.S. Social Security records in 1977. Mailing first appears in the data in 1977 and reached its peak in 1977 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Mailing? (U.S. births per year)
U.S. births per year, 1977–1977 · hover or tap for the count and national rank · source: U.S. Social Security Administration