Cason is a modern American first name taken from the English surname Cason, which goes back to the medieval given name Cass and is read as "son of Cass"; it owes most of its appeal to the rhyme with Mason, Jason and Grayson. It is the original spelling of a family that also includes Kason, Casen and Cayson. Cason entered the US top 1000 in 2002, peaked at number 424 in 2014 and ranks number 846 in 2025.