“The sons of Jether were Jephunneh, Pispa, and Ara.”
There were 6 different biblical people with the name of Jether. 2 of the sons of this Jether of Asher are only mentioned here (2) Pispa and (3) Ara. The other famous (1) Jephunneh was the father of Caleb, called a Kenizzite. However, this is not him.