Dennison is a distinctive boys' name in United States, ranking #11102 in 2018 with 6 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #4440. Since 1996, the popularity has increased by 20.0%. In 2018, approximately 1 in every 302,579 boys born was named Dennison. RISING Recent data shows the name is currently rising.