Ennis is a distinctive boys' name in United States, ranking #4964 in 1998 with 13 recorded births. The name reached its all-time peak in 1997 with 36 births ranking #2324. Since 1996, the popularity has increased by 160.0%. In 1998, approximately 1 in every 147,024 boys born was named Ennis. FALLING Recent data shows the name is currently falling.