Meaning of Mattox. English name. In English, the name Mattox means-gods gift.The name Mattox originated as an English name. The name Mattox is a unisex name and can be used for a boy or girl name (male or female).English Name Meaning-gods gift.Origin-England.nglish name. In English, the name Mattox means-gods gift.The name Mattox originated as an English name. The name Mattox is a unisex name and can be used for a boy or girl name (male or female). English Name Meaning-gods gift.