from
Easton's 1897 Bible Dictionary
Hobab
beloved, the Kenite, has been usually identified with Jethro
(q.v.), Ex. 18:5, 27; comp. Num. 10:29, 30. In Judg. 4:11, the
word rendered "father-in-law" means properly any male relative
by marriage (comp. Gen. 19:14, "son-in-law," A.V.), and should
be rendered "brother-in-law," as in the R.V. His descendants
followed Israel to Canaan (Num. 10:29), and at first pitched
their tents near Jericho, but afterwards settled in the south in
the borders of Arad (Judg. 1:8-11, 16).