Rennie is a distinctive boys' name in United States, ranking #9176 in 2002 with 7 recorded births. The name reached its all-time peak in 2003 with 9 births ranking #7700. Since 1996, the popularity has increased by 16.7%. In 2002, approximately 1 in every 277,353 boys born was named Rennie. FALLING Recent data shows the name is currently falling.