Rennie is a distinctive boys' name in United States, ranking #12813 in 2004 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 2004, approximately 1 in every 396,960 boys born was named Rennie. FALLING Recent data shows the name is currently falling.