High Quality Content by WIKIPEDIA articles! Simon Byrne (1806 – 2 June 1833), nicknamed "The Emerald Gem", was an Irish bare-knuckle prize fighter. The heavyweight boxing champion of Ireland, he was drawn to England by the larger sums of prize money on offer and his hopes of becoming the heavyweight champion there as well. He became one of only six fighters ever to have been involved in fatal fights as both survivor and deceased since records began in 1741.