Dennis is a moderately popular boys' name in England & Wales, ranking #453 in 2024 with 89 recorded births. The name reached its all-time peak in 2017 with 139 births ranking #343. Since 1996, the popularity has increased by 64.8%. In 2024, approximately 1 in every 3,121 boys born was named Dennis. FALLING Recent data shows the name is currently falling.