Christ, used by Christians as both a name and a title, unambiguously refers to Jesus. It is also used as a title, in the reciprocal usage "Christ Jesus", meaning "the Messiah Jesus" or "Jesus the Anointed", and independently as "the Christ". The Pauline epistles, the earliest texts of the New Testament, often call Jesus "Christ Jesus" or just "Christ".

Xmas is a common abbreviation of the word Christmas. It is sometimes pronounced, but Xmas, and variants such as Xtemass, originated as handwriting abbreviations for the typical pronunciation. The 'X' comes from the Greek letter Chi, which is the first letter of the Greek word Christós, which became Christ in English. The suffix -mas is from the Latin-derived Old English word for Mass.