Sir is a distinctive boys' name in United States, ranking #3087 in 1999 with 27 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 42.1%. In 1999, approximately 1 in every 71,114 boys born was named Sir. FALLING Recent data shows the name is currently falling.