Kase is a modern American spelling of Case, which is usually traced to Casey, the Irish Cathasaigh, "vigilant" or "watchful"; the k-spelling also echoes Kace and Kason. The name belongs to the family of short, punchy boys' names that spread in the 2010s. Kase entered the US top 1000 in 2012, peaked at number 618 in 2018 and has slipped to number 1115 in 2025.