The descendants of Naphtali

In Numbers, chapter 26:48-50, the four descendants of Naphtali were exactly the same as in Genesis.  The four sons of Naphtali were Jahzeel with his clan of the Jahzeelites, Guni with his clan of the Gunites, Jezer with his clan of the Jezerites, and Shillem with his clan of the Shillemites.  The families of Naphtali had decreased by 9,000, from 53,400 to 45,400.  What do you know about Naphtali?