Dennison is a distinctive boys' name in United States, ranking #11343 in 2009 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 2009, approximately 1 in every 330,551 boys born was named Dennison. RISING Recent data shows the name is currently rising.