Cinuit may have been an early king of Alt Clut

Kingdom of Strathclyde

Strathclyde , originally Brythonic Ystrad Clud, was one of the early medieval kingdoms of the celtic people called the Britons in the Hen Ogledd, the Brythonic-speaking parts of what is now southern Scotland and northern England. The kingdom developed during the post-Roman period...

, later known as Strathclyde, a Brythonic

Britons (historical)

The Britons were the Celtic people culturally dominating Great Britain from the Iron Age through the Early Middle Ages. They spoke the Insular Celtic language known as British or Brythonic...

 kingdom in the Hen Ogledd

Hen Ogledd

Yr Hen Ogledd is a Welsh term used by scholars to refer to those parts of what is now northern England and southern Scotland in the years between 500 and the Viking invasions of c. 800, with particular interest in the Brythonic-speaking peoples who lived there.The term is derived from heroic...

or "Old North" of Britain

Great Britain

Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

. The Harleian genealogies

Harleian genealogies

The Harleian genealogies are a collection of Old Welsh genealogies preserved in British Library, Harleian MS 3859. Part of the Harleian Collection, the manuscript, which also contains the Annales Cambriae and a version of the Historia Brittonum, has been dated to c. 1100, although a date of c.1200...

 indicate that he was the son of Ceretic Guletic, who may be identified with the warlord Ceredig rebuked by Saint Patrick

Saint Patrick

Saint Patrick was a Romano-Briton and Christian missionary, who is the most generally recognized patron saint of Ireland or the Apostle of Ireland, although Brigid of Kildare and Colmcille are also formally patron saints....

 in one of his letters. According to the same pedigrees, he was the father of Dumnagual Hen

Dumnagual I of Alt Clut

Dumnagual I, also known as Dumnagual Hen , was a ruler of the Brythonic kingdom of Alt Clut , later known as Strathclyde, probably sometime in the early 6th century. His biography is vague, but he was regarded as an important ancestor figure for several kingly lines in the Hen Ogledd or "Old North"...

, an important but obscure ancestor figure in Welsh tradition. The later genealogy Bonedd Gwŷr y Gogledd

Bonedd Gwŷr y Gogledd

Bonedd Gwŷr y Gogledd is a brief Middle Welsh tract which claims to give the pedigrees of twenty 6th-century rulers of the Hen Ogledd , the Brythonic-speaking parts of southern Scotland and northern England. It is attested in a number of manuscripts, the earliest being NLW, Peniarth MS 45, which...

replaces Cinuit as Dumnagual's father with a certain Idnyuet, said to be the son of Maxen Wledic

Magnus Maximus

Magnus Maximus , also known as Maximianus and Macsen Wledig in Welsh, was Western Roman Emperor from 383 to 388. As commander of Britain, he usurped the throne against Emperor Gratian in 383...

 (the Roman usurper Magnus Maximus). However, the Bonedd does include a "Cynwyd Cynwydion" in the ancestry of Clydno Eiddyn, and a triad

Welsh Triads

The Welsh Triads are a group of related texts in medieval manuscripts which preserve fragments of Welsh folklore, mythology and traditional history in groups of three. The triad is a rhetorical form whereby objects are grouped together in threes, with a heading indicating the point of likeness...

 attached to the text mentions the "three hundred swords of the (tribe of) Cynwydion" as one of three formidable north British war bands, along with those of Coel Hen and Cynfarch.