Cortni is a unique and modern given name of American origin, derived from the Cornish surname Courtney. It gained popularity in the United States during the late 20th century as a unisex given name but has since become more associated with females. The name Cortni was not ranked among the top 1000 names for babies born in the U.S. between 2007 and 2018, suggesting it is now less common than during its peak popularity.
The name Cortni experienced popularity throughout the late 1970s to mid-1990s, peaking in 1988 with 48 births. However, it has since declined significantly, with only 5 births recorded in 2022.