The most common forms are Ioan [yó-an] Iwan[yooan] and Siôn [shón].
Siôn is the Welsh form of John, and is pronounced SHON.
John Welsh of Ayr was born in 1568.
John Welsh of Ayr died in 1622.
John Edwards - Welsh politician - was born in 1882.
John Welsh - footballer - was born on 1984-01-10.
John Welsh - actor - died on 1985-04-21.
John Welsh - actor - was born on 1904-11-07.
John Dixon - Welsh politician - was born in 1951.
Francis John Welsh Whipple died in 1943.
Francis John Welsh Whipple was born in 1876.
John Walters - Welsh cleric - died in 1797.
John Edwards - Welsh politician - died in 1960.