|Full name||Iorweth Isaac|
|Date of birth||12 October 1911|
|Place of birth||Cilfynydd, Wales|
|Date of death||25 April 1966(aged 54)|
|Place of death||Wrexham, Wales|
|School||Pontypridd Grammar School|
|Notable relative(s)||David Phillip Isaac (son) Jonathan Iorwerth Isaac, Bethan Jane Batty (Grandchildren)|
|Children||David Phillip Isaac|
|Rugby league career|
|Rugby union career|
Iorwerth Isaac commonly known as Iorrie Isaac (12 October 1911 – 25 April 1966) was a Welsh dual-code international rugby flanker who played international rugby for Wales. At club level he played rugby union for Pontypridd, Cardiff and later rugby league for Wales, and Leeds.
Isaac was first selected for Wales in their opening game of the 1933 Home Nations Championship. The match was against England at their national stadium, Twickenham. Wales had failed to win at the ground in their first nine attempts, and the Welsh failure at the ground was known as the 'Twickenham bogey'. Isaac was placed at open-side flanker, opposite the veteran Tom Arthur who was positioned on the blind side. In an exciting match Isaac, along with Turnbull and Arthur, continually spoiled the English scrum. When Isaac caused the English half-backs to loose the loose maul, Watcyn Thomas heeled the ball back for Wooller and then Davey to feed Ronnie Boon who scored a Welsh try. The game ended 7-3, with all the Welsh points scored by Boon, who had also placed a drop goal. Isaacs played just one more international game in the very next match of the Home Nations Championship against Scotland at St. Helens, his international career identical to that of Raymond Bark-Jones.
At the start of the 1933/34 season Isaac left rugby union behind when he 'Went North' switching to the professional rugby league game, joining Leeds RLFC.
International matches played
International Rugby League Honours
- Godwin, Terry (1984). The International Rugby Championship 1883–1983. London: Willows Books. ISBN 0-00-218060-X.
- Griffiths, Terry (1987). The Phoenix Book of International Rugby Records. London: Phoenix House. ISBN 0-460-07003-7.
- Smith, David; Williams, Gareth (1980). Fields of Praise: The Official History of The Welsh Rugby Union. Cardiff: University of Wales Press. ISBN 0-7083-0766-3.
- WRU player profile
- Williams, Graham; Lush, Peter; Farrar, David (2009). The British Rugby League Records Book. London League. pp. 108–114. ISBN 978-1-903659-49-6.
- Smith (1980), pg 274.
- Smith (1980), pg 276.
- Smith (1980), pg 277.
- Smith (1980), pg 467.
- "Statistics at rugbyleagueproject.org". rugbyleagueproject.org. 31 December 2011. Retrieved 1 January 2012.