What is "chagnoald"

Chagnoald (Cagnoald, Cagnou) (died 633 AD) was a Frankish bishop of Laon during the 7th century. The family to which Chagnoald belonged is known as the Faronids, named after his brother Saint Faro, who was bishop of Meaux, while his sister was Saint Burgundofara, who founded the convent of Faremoûtiers. They were the children of the chancellor to Dagobert I, Chagneric.