Nidan

He was the confessor for the monastery headed by St Seiriol at Penmon, and established a church at what is now known as Llanidan, which are both places on the Welsh island of Anglesey.

Midmar Old Kirk in Aberdeenshire, Scotland, is also dedicated to him: Nidan is said to have helped to establish Christianity in that area as a companion of St Kentigern.

[2] He was a descendant of Urien Rheged, as was Saint Grwst of Llanrwst, a town on the north Wales mainland in present-day Conwy County Borough.

[4] Urien was a "celebrated warrior" from the late 5th century, whose deeds were commemorated by the Welsh poet Taliesin.

Together with another of Kentigern's companions, Finan or Ffinan, they are said to have established Christianity in Midmar, in what is now Aberdeenshire, in the 7th century.

[2][14] Nidan was venerated as a saint, although he was never canonized by a pope: as the historian Jane Cartwright notes, "In Wales sanctity was locally conferred and none of the medieval Welsh saints appears to have been canonized by the Roman Catholic Church".