Valency is a girl name. It last appeared in U.S. Social Security records in 1972. Valency first appears in the data in 1972 and reached its peak in 1972 (11 births). The chart below shows how the name has risen and fallen over time.
How popular is Valency? (U.S. births per year)
U.S. births per year, 1972–1972 · hover or tap for the count and national rank · source: U.S. Social Security Administration