Complex sentence: Wermund subsequently raised Freawin's sons Ket and Wig as his own, however they would eventually cause great dishonour to the Angles when they ambushed Atisl in a forest as he walked alone and slew him.
Split into simpler sentences: Wermund subsequently raised Freawine's sons Ket and Wig as his own. The two would eventually cause great dishonour to the Angles when they ambushed Atisl in a forest as he walked alone and slew him.