Sir is the English title of respect and address for a knight, from the Old French sire and ultimately the Latin senior, "elder" or "lord". As a first name it belongs to the group of title names such as King, Prince and Major that have grown in the United States since the 2000s; the rapper Jay-Z and Beyoncé named their son Sir Carter in 2017. Sir rose from number 4042 in 2000 to a peak of number 1467 in 2021 and stands at number 2179 in 2025.