Sir is a distinctive boys' name in United States, ranking #1531 in 2019 with 111 recorded births. The name reached its all-time peak in 2021 with 123 births ranking #1466. Since 1996, the popularity has increased by 484.2%. In 2019, approximately 1 in every 16,156 boys born was named Sir. FALLING Recent data shows the name is currently falling.