Sir is a distinctive boys' name in United States, ranking #2511 in 2016 with 51 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 168.4%. In 2016, approximately 1 in every 37,200 boys born was named Sir. FALLING Recent data shows the name is currently falling.