Complex sentence: He was executed along with another "malefactor", Trahaern ap Hywel; although the latter was dealt with by the town executioner, Cragh was hanged by one of his own relatives, Ythel Fachan, who was forced into that service by de Briouze.
Split into simpler sentences: He was executed along with another "malefactor", Trahaern ap Hywel. Although the latter was dealt with by the town executioner, Cragh was hanged by one of his own relatives, Ythel Fachan, who was forced into that service by de Briouze.