Mammertin is said of mamma, which is as much to say as a pap, and of tine, that is to say taste, for like as taste that falleth from the pap into the mouth of the child, and is first nature of blood, and after it is converted into the sweetness of milk, in like wise was he nourished, first in blood, that is to say in sin, and after, he converted himself anon into the pap of his heart in the sweetness of God.

The Life of Saint Mammertin, Jacobus de Voragine