Sir is a distinctive boys' name in United States, ranking #2383 in 2015 with 55 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 189.5%. In 2015, approximately 1 in every 34,841 boys born was named Sir. FALLING Recent data shows the name is currently falling.