The progenitor of the Anakim was Arba “the father of Anak” Joshua 15:13, from whom the city of Hebron took its name of Kirjath-Arba. Ahiman, Sheshai, and Talmai were probably not individual warriors, but names of three tribes of the Anakim. Hence, we find them still in existence half a century later, when Caleb, who now brought tidings of them, became their eventual destroyer Joshua 15:14.
Now Hebron ... - This parenthesis explains that these two cities had a common founder, and were built, or perhaps, at least in the case of Zoan (Tanis, see Exodus 1:8, note; Exodus 2:5, note) rebuilt, by the Hyksos, to which nations, once the conquerors of Egypt, the Anakim perhaps belonged. The Hyksos fortified and garrisoned Zoan as a defense of their Eastern frontier.