Caught every one his fellow by the head - Probably by the beard, if these persons were not too young to have one, or by the hair of the head. Alexander ordered all the Macedonians to shave their beards; and being asked by Parmenio why they should do so, answered, "Dost thou not know that in battle there is no better hold than the beard?"
Helkath-hazzurim - "The portion of the mighty;" or, "The inheritance of those who were slain," according to the Targum.
Compare Livy‘s history of the battle between the Horatii and Curiatii. This combat, like that, may have been proposed as a means of avoiding the effusion of blood of two nations united by consanguinity, and having a common powerful enemy in the Philistines.
Helkath-hazzurim - i. e. “the part, field, or plat Genesis 23:19 of the sharp edges or blades.” This seems, on the whole, the best explanation of this rather obscure name.