Merce is a unisex name. It last appeared in U.S. Social Security records in 1927. Merce first appears in the data in 1925 and reached its peak in 1925 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Merce? (U.S. births per year)
U.S. births per year, 1925–1927 · hover or tap for the count and national rank · source: U.S. Social Security Administration