Salomon (also known as Selyf, Selevan) was a late 5th century Cornish 'warrior prince', possibly a King of Cornwall. His feast day takes place on the 18 October.^[1] He was the father of the Cornish bishop Saint Cybi.

According to Sabine Baring-Gould, Salomon was the son of Geraint ab Erbin, Prince of Dumnonia. This agrees with the Bonedd y Saint, a Welsh genealogical tract detailing the lineages of the early British saints. Salomon married Gwen ferch Cynyr, the daughter of Cynyr Ceinfarfog who had settled at Caer-Goch near St David's in Pembrokeshire. Gwen ferch Cynyr was the sister of Saint Non.^[2]

According to the Life of St Cybi, Selevan, (a Brythonic form of Solomon) was a Cornishman and the father of Cybi. Salomon is described as a princeps militiae at a court between the River Tamar and the River Lynher, possibly Gelliwig.^[3] Welsh historian Arthur Wade-Evans interpreted this title as 'captain of the guard', while others believe he was a sub-king of Cornwall. David Nash Ford suggests that he succeeded to the realm of his cousin, King Mark.

Lansallos is a foundation of Salomon. Baring-Gould mentions a holy well of his sister-in-law, Non, and a church of his son, Cybi, in the area between Roseland and Grampound.^[4]

Salomon is identified with Selevan, of St Levan in Cornwall and Penmon on Anglesey.^[5] On the cliff at St Levan is St Levan's Well and below it the probable remains of his chapel, which were described by William Borlase in his Antiquities.^[6] The "Selus stone" at St Just in Penwith Parish Church is thought to refer to Salomon. The identity of Saint Just is not known.^[7] Among the possibilities mentioned is the Welsh hermit, Saint Iestyn, said to be a son of Geraint ab Erbin.

In the department of Morbihan in Brittany are four places connected to a Saint Saloman. Baring-Gould suggests this is a second, separate individual.^[2]