Melaine was a 6th-century bishop of Rennes, serving the region of Brittany in what is now France. Born to a Gallo-Roman family near Redon, he initially lived as a monk and founded a small monastery. He eventually succeeded Bishop Amand, a transition that local traditions suggest he accepted with significant hesitation. During his tenure, he served as a counselor to Clovis and participated in the First Council of Orléans in 511.