Caradog ap Gwyn & verch Gwerystan 
They had a son named Trahaearn.
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Children
Prince of North Wales Trahaearn ap Caradog
Trahaearn was born in 1030 in Arwystli, Montgomeryshire, Wales.2 He died due to Battle of Carno at the age of 51 in 1081 in Arwystli, Montgomeryshire, Wales.2
1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=arciek&id=I11028&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=tjglad&id=I68203&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=tjglad&id=I68203&style=TABLE