Sir is a distinctive boys' name in United States, ranking #2460 in 2005 with 47 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 147.4%. In 2005, approximately 1 in every 42,492 boys born was named Sir. FALLING Recent data shows the name is currently falling.