Easton's 1897 Bible Dictionary:

Hur
   a hole, as of a viper, etc. (1.) A son of Caleb (1 Chr. 2:19,
   50; 4:1, 4; comp. 2 Chr. 1:5).

     (2.) The husband of Miriam, Moses' sister (Ex. 17:10-12). He
   was associated with Aaron in charge of the people when Moses was
   absent on Sinai (Ex. 24:14). He was probably of the tribe of
   Judah, and grandfather of Bezaleel (Ex. 31:2; 35:30; 1 Chr.
   2:19).

     (3.) One of the five princes of Midian who were defeated and
   slain by the Israelites under the command of Phinehas (Num.
   31:8).


Hitchcock's Bible Names Dictionary (late 1800's):

Hur, liberty; whiteness; hole