Malo was a 6th-century Welsh bishop and priest who played a significant role in the early Christianization of northern Europe. Born in Llancarfan around 520, he was the son of Dervel and a cousin to Saint Samson. After serving as a preacher at an abbey and studying under Brendan the Navigator, he traveled extensively, evangelizing regions such as northern Scotland and the Orkney Islands. He eventually became the first Bishop of Aleth, succeeding the hermit Aaron in 544.