Short or court attendant
A modern phonetic spelling of Courtney. It originates from the Old French 'curt' meaning short, or as a habitational name for someone from Courtenay in France. While the original surname was aristocratic, this specific spelling is a contemporary American invention.
Less common today
Kortnee isn't in the latest US Top 1000. It last peaked at #2,596 in 1990.
US births per 5-year period, 1990βpresent (SSA data).