Casey
Casey comes from the Irish surname Ó Cathasaigh, meaning "descendant of Cathasach" — from "cathasach" (vigilant, brave). The name began as an Irish surname and crossed to first-name usage in the early 20th century, used for both boys and girls. Casey was a top-200 American name from 1970 to 2000, peaking at #108 in 1986. Casey Affleck (born 1975), the actor who won the Oscar for "Manchester by the Sea" (2016), is the most famous male bearer. Casey (the character Casey Kasem, 1932-2014, the radio host of "American Top 40") gave the name a pop-culture charge. I find Casey has a friendly, slightly unisex quality — the "C" opening is firm, and the "ee" ending gives it brightness. Casey is one of the rare truly unisex names that works equally on either gender. Casey is a unisex name of Irish origin that means "Vigilant, brave (from Cathasaigh)". Friendly, unisex, and approachable. The name sounds cheerful. Caseys tend to be social. US top 300 since 1980s. Well-known people named Casey include Casey Affleck (actor), Casey Kasem (radio host), Casey (Irish surname), Casey (fictional, various). Common variations and related forms of Casey include Kasey (variant), Caci (modern), Case (short form), KC (initial form).