Mâthonwy, father of Mâth, [260], [308].

Matière de Bretagne, the, [363], [365].

Matthew Arnold, [3], [16], [356].

May Day, [123], [259], [287], [407].

May Eve, [377], [407].

Maypole, [408].

Meadha, the sídh of, [136], [212], [243].

Meath, [179].

Medb, queen of Connaught, [147], [154], [164]-168, [170], [171], [172], [175], [178], [179], [183], [200], [246];

makes war on Ulster to get the Brown Bull of Cualgne, [165]-166;