Rennie is a distinctive boys' name in United States, ranking #7700 in 2003 with 9 recorded births. The name reached its all-time peak in 2003 with 9 births ranking #7700. Since 1996, the popularity has increased by 50.0%. In 2003, approximately 1 in every 219,474 boys born was named Rennie. FALLING Recent data shows the name is currently falling.