שַׁמְגַּר

Judges 3:31 שַׁמְגַּ֣ר Shamgar

After Ehud came Shamgar son of Anath. And he too saved Israel, striking down six hundred Philistines with an oxgoad.

Here: Not a Hebrew name. It is most often explained as Hurrian (a people of northern Mesopotamia and Syria whose names turn up across Late Bronze Age Canaan), perhaps 'Shimig (the sun god) has given'. The name itself marks him as an outsider or as someone from Canaan's mixed population.

Judges 5:6 שַׁמְגַּ֤ר Shamgar

In the days of Shamgar son of Anath, in the days of Jael, the highways were deserted and the travelers took the byways.

Here: The fighter of Judges 3:31 who killed 600 Philistines with an ox-goad. The name is not Hebrew in form and is often explained as Hurrian (a people of northern Mesopotamia and Syria). That suggests a non-Israelite or mixed background.