Dennett is a boy name. It last appeared in U.S. Social Security records in 1953. Dennett first appears in the data in 1953 and reached its peak in 1953 (5 births). The chart below shows how the name has risen and fallen over time.
How popular is Dennett? (U.S. births per year)
U.S. births per year, 1953–1953 · hover or tap for the count and national rank · source: U.S. Social Security Administration