Sir is a distinctive boys' name in United States, ranking #2801 in 2007 with 43 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 126.3%. In 2007, approximately 1 in every 48,261 boys born was named Sir. FALLING Recent data shows the name is currently falling.