Thengel was the 16th King of Rohan, and 7th of the Second Line of the House of Eorl. He was the only son (and third child) of Fengel, and he left home at an early age, passing south to Gondor where he earned renown and honour.

He married Morwen of Lossarnach when he was 38. They had five children, of whom Théoden was the only son.

The family moved reluctantly back to Rohan after the death of Fengel. Thengel then reigned for 27 years. The main problem during his reign was Saruman, who claimed Isengard for his own during Thengel's sovereignty.

Aragorn, disguised as a soldier of fortune, served Thengel as a Captain of War for some years.
Encyclopedia entry originally written by atalante_star