Fengel was the fifteenth King of Rohan and the sixth king of the second line. He was the third son, and fourth child, of Folcwine.

Fengel is not remembered with praise. He was greedy of food and gold, and was always at odds with his marshals and his children.

Fengel's third child and only son, Thengel, left Rohan as soon as he came to manhood and lived for a long time in Gondor. Thengel won great honor in the service of Turgon of Gondor.

Fengel was succeeded by his son Thengel.