In this speech of Achilles, the hero is boasting, as expressed by way of the solemn word eukhesthai ‘claim’, I.21.187, about his genealogy as son of Peleus son of Aiakos son of Zeus himself, I.21.188–189. The point of the boast that Achilles makes here is that his genealogy is superior to that of the hero Asteropaios, whom he has just killed, I.21.139–183. This hero of the Trojans, as we learn at I.21.130–143, is the grandson of the river god Axios. Provocatively, Achilles is boasting that the lineage of Zeus, from which he is descended, is superior to the lineage of any river god, I.21.193–199, and, in this context, Achilles mentions by name two of the mightiest river gods: Akhelōios at I.21.194 and Ōkeanos at I.21.195. Even the Ōkeanos, Achilles goes on to say, would be defeated by Zeus in a one-on-one combat of cosmic proportions, I.21.196–199. This whole speech of Achilles is of course a direct provocation to the river Scamander, I.21.136–138. As we saw previously at I.20.74, the name of this river Scamander, Skamandros in Greek, is also the name of the river god who embodies the river, and that is how mortals address the god of the river, as Scamander, while Xanthos is the name that the gods themselves give to him. See the comment on I.20.001–074. Thus the river god Scamander can take it personally that Achilles here is insulting not only the river god Axios, from whom his dead enemy Asteropaios was descended, but also all river gods. And Achilles goes even further: he insults Scamander directly, declaring earlier at I.21.130-132 that the river god had failed to rescue the Trojans— despite the fact that they would customarily offer sacrifices of bulls and stallions to Scamander, I.21.131-132.