Unlike the descriptions of other Biblical Judges, the first reference to Shamgar has no introduction, conclusion, or reference to the length of reign, and the subsequent text follows on directly from the previous narrative. In several ancient manuscripts this reference to Shamgar occurs after the accounts of Samson rather than immediately after the account of Ehud, in a way that is more narratively consistent; scholars believe that this latter position is more likely to be the passage's original location.
The act of this Shamgar is evidently similar to that of Shammah, son of Agee, mentioned in the appendix of the Books of Samuel as being one of The Three, a distinct group of warriors associated with King David; scholars believe that the same individual is meant, and that the passage in the book of Judges moved to its present location as a result of the mention of a Shamgar in the subsequent (to the present position) Song of Deborah. Scholars also believe that the name of the individual may originally have been Shammah, and became corrupted under the influence of the Shamgar in the Song of Deborah. The term translated as oxgoad is a biblical hapax legomenon, the translation into English being made on the basis of the Septuagint's translation into Greek.
The other mention of Shamgar, that in the Song of Deborah, connects Shamgar with a low period of Israelite society, and thus some scholars suspect him to have been a foreigner causing the oppression of Israelite society, rather than an Israelite ruler. From the form of the name, it is suspected that Shamgar may actually have been a Hittite, a similar name occurring with Sangara, a Hittite king of Carchemish; it is also the case that Anath is the name of a Canaanite deity, and son of Anath is thus merely a royal title. Additionally, there is reason to suspect that far from being an Israelite hero, Shamgar may actually have been the father of Sisera.