Sir is a distinctive boys' name in United States, ranking #3174 in 1998 with 25 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 31.6%. In 1998, approximately 1 in every 76,453 boys born was named Sir. FALLING Recent data shows the name is currently falling.