Karsyn is a feminine spelling of Carson, a Scottish surname of uncertain meaning, usually explained as "son of Carr" or "son of the marsh dweller". The K and the -syn ending give the surname a girls'-name look in the manner of Kamryn and Kinsley. Karsyn ranked number 1374 in the United States in 2000, entered the top 1000 in 2008, peaked at number 557 in 2018 and ranks number 719 in 2025.