 There is evidence to suggest that Óláfr might have had a fourth son named Guðrøðr . For example , the chronicle relates how the governor of Mann , described as a kinsman of Haraldr , fled from the king in 1238 and set sail for Wales , taking with him his foster @-@ son Guðrøðr Óláfsson . When the fleeing ship reached the Welsh coast it was wrecked and , according to the chronicle , Guðrøðr perished on board . Furthermore , amongst the names of witnesses within a quitclaim between Llywelyn ap Gruffudd ( d . 1282 ) and Ralph de Mortimer ( d . 1246 ) , thought to date to about 1241 , there is a certain Guðrøðr who appears in Latin as Godredo filio regis Mannie ( " Guðrøðr , son of the King of Mann " ) . Although the possibility has been raised that the two sources may refer to the same man , there is no further evidence to confirm it . 
