John Trevor (died April 10, 1410), or John Trevaur, was Bishop of St. Asaph

Bishop of St Asaph

The Bishop of St Asaph heads the Church in Wales diocese of St Asaph.The diocese covers the counties of Conwy and Flintshire, Wrexham county borough, the eastern part of Merioneth in Gwynedd and part of northern Powys. The Episcopal seat is located in the Cathedral Church of St Asaph in the town of...

 in Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 before becoming nominal Bishop of St Andrews in Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. He was provided to the see

Episcopal See

An episcopal see is, in the original sense, the official seat of a bishop. This seat, which is also referred to as the bishop's cathedra, is placed in the bishop's principal church, which is therefore called the bishop's cathedral...

 of St Asaph

St Asaph

St Asaph is a town and community on the River Elwy in Denbighshire, Wales. In the 2001 Census it had a population of 3,491.The town of St Asaph is surrounded by countryside and views of the Vale of Clwyd. It is situated close to a number of busy coastal towns such as Rhyl, Prestatyn, Abergele,...

 on October 21, 1394. He was translated to St Andrews in 1408. As Bishop of St. Andrews, he was an anti-Bishop and never took possession of the see. This situation was the product of the Western Schism

Western Schism

The Western Schism or Papal Schism was a split within the Catholic Church from 1378 to 1417. Two men simultaneously claimed to be the true pope. Driven by politics rather than any theological disagreement, the schism was ended by the Council of Constance . The simultaneous claims to the papal chair...

, in which the Scots supported the Avignon Popes

Avignon Papacy

The Avignon Papacy was the period from 1309 to 1376 during which seven Popes resided in Avignon, in modern-day France. This arose from the conflict between the Papacy and the French crown....

, and so only candidates of the Avignon Popes could take possession of the see.

His original name was Ieuan, which he later anglicised to John and took on the surname Trevor. Trevor's brother Adda was married to the sister of Owain Glyndŵr

Owain Glyndwr

Owain Glyndŵr , or Owain Glyn Dŵr, anglicised by William Shakespeare as Owen Glendower , was a Welsh ruler and the last native Welshman to hold the title Prince of Wales...

, who appointed him as an ambassador to the French court.

He died in Rome.