Máel Dub was reputedly an Irish monk of the 7th century said to have founded a monastic house at Malmesbury.

It was implied by Bede

Bede

Bede , also referred to as Saint Bede or the Venerable Bede , was a monk at the Northumbrian monastery of Saint Peter at Monkwearmouth, today part of Sunderland, England, and of its companion monastery, Saint Paul's, in modern Jarrow , both in the Kingdom of Northumbria...

 that the monastery was said to have been named after him (HE 5.18, the monastery "which they call the monastery of Máel Dub" [quod Maildubi Urbem nuncupant]). There is evidence from a later charter that his name was actually Máel Duin.

Among his pupils were Aldhelm, the founder of Malmesbury Abbey

Malmesbury Abbey

Malmesbury Abbey, at Malmesbury in Wiltshire, England, was founded as a Benedictine monastery around 676 by the scholar-poet Aldhelm, a nephew of King Ine of Wessex. In 941 AD, King Athelstan was buried in the Abbey. By the 11th century it contained the second largest library in Europe and was...

, and Daniel of Winchester

Daniel of Winchester

Daniel of Winchester was Bishop of the West Saxons, and Bishop of Winchester from ca. 705 to 744.-Life:The prominent position which he held among the English clergy of his time can best be appreciated from the fact that he was the intimate friend of St. Aldhelm at Sherborne, of Bede at Jarrow and...

.