Rennie is a distinctive boys' name in United States, ranking #13650 in 2021 with 5 recorded births. The name reached its all-time peak in 2003 with 9 births ranking #7700. Since 1996, the popularity has decreased by 16.7%. In 2021, approximately 1 in every 349,647 boys born was named Rennie. FALLING Recent data shows the name is currently falling.