Matthew of Paris, [74]

Melynydd, [317]

Meredith, son of Glyndwr, [105], [233], [276], [304], [306]

Meredith ap Owen, [118]

Merioneth, [78], [215], [287], [301], [313]

Milford, [254], [255]

Monmouth, [259], [317], [330]

Monnington, [104], [303-305]

Monnow River, [246]

Montgomery, [32], [146], [177], [317]