Sir is a distinctive boys' name in United States, ranking #3323 in 2009 with 34 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 78.9%. In 2009, approximately 1 in every 58,333 boys born was named Sir. FALLING Recent data shows the name is currently falling.