Poliporthes

In Greek mythology Poliporthes was the son born to Odysseus and Penelope after the former's return from the Trojan War. He was so named because his father had sacked the city of Troy.
In the Bibliotheca of Apollodorus there is a retelling of the Odyssey: after Odysseus returned home and killed the suitors he departed to Thesprotia and had a child named Polypoetes with Callidice, the queen of the region, before returning to Ithaca. Upon returning, he discovered that Penelope had given birth to Poliporthes. Apollodorus also mentions that there is more information about him in the epic poem Thesprotis, a now-lost text mentioned by Pausanias.
Alternatively, he was the son of Telemachus and Nausicaa and Odysseus gave him this name.