Complex sentence: Eidu had sixteen sons, among whom the most prominent were the youngest, Ebilun, and the eighth, Turgei, who took part in many militarty campaigns during Hong Taiji's reign, and was highly regarded for his bravery.
Split into simpler sentences: Eidu had sixteen sons, among whom the most prominent were the youngest, Ebilun, and the eighth, Turgei. Turgei took part in many militarty campaigns during Hong Taiji's reign, and was highly regarded for his bravery.