Chay is a masculine name. It is either a diminutive of Charles,[1] ultimately derived from Germanic Karal, Karel, Karl, meaning “man”, or it may be Gaelic in origin, meaning “Fairy Tale” . This unusual name surfaced into the public in Britain in the mid-1970s, with the publicity for yachtsman Chay Blyth. It is generally pronounced Sh (as in Shane) ay (as in May), and sometimes pronounced Ch (as in Charles) ay (as in May) .
Also an ancient word derived from the Old Testament meaning "And Yahweh will give you a son".