Sir is a distinctive boys' name in United States, ranking #2820 in 2006 with 41 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 115.8%. In 2006, approximately 1 in every 50,125 boys born was named Sir. FALLING Recent data shows the name is currently falling.