Beta is a girl name. It last appeared in U.S. Social Security records in 1993. Beta first appears in the data in 1955 and reached its peak in 1993 (6 births). The chart below shows how the name has risen and fallen over time.
How popular is Beta? (U.S. births per year)
U.S. births per year, 1955–1993 · hover or tap for the count and national rank · source: U.S. Social Security Administration