Sir is a distinctive boys' name in United States, ranking #3137 in 2001 with 29 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 52.6%. In 2001, approximately 1 in every 66,994 boys born was named Sir. FALLING Recent data shows the name is currently falling.