John Gills Exposition of the Bible Commentary - Numbers 10:29
And Moses said unto Hobab, the son of Raguel the Midianite , Moses's father in law ,.... Some think this Hobab was the same with Jethro, whose father's name was Raguel or Reuel; so Jarchi and Ben Gersom; but rather Raguel or Reuel, and Jethro, seem to be the same, and was Moses's father-in-law, and this Hobab was the son of him, and brother of Zipporah, Moses's wife; and the same relation is designed whether the word is rendered his "father-in-law" or his "wife's brother", so Aben Ezra;... read more
Matthew Henry's Complete Commentary - Numbers 10:29-36
Here is, I. An account of what passed between Moses and Hobab, now upon this advance which the camp of Israel made towards Canaan. Some think that Hobab was the same with Jethro, Moses's father-in-law, and that the story, Exod. 18:1-27, should come in here; it seems more probable that Hobab was the son of Jethro, alias Reuel, or Raguel (Exod. 2:18), and that when the father, being aged, went to his own land (Exod. 18:27), he left his son Hobab with Moses, as Barzillai left Chimham with David;... read more