Synclair is a girl name. It last appeared in U.S. Social Security records in 2019. Synclair first appears in the data in 1994 and reached its peak in 1994 (7 births). The chart below shows how the name has risen and fallen over time.
How popular is Synclair? (U.S. births per year)
U.S. births per year, 1994–2019 · hover or tap for the count and national rank · source: U.S. Social Security Administration