In Greek mythology, the name Ctesippus (Κτήσιππος) may refer to:
A son of Heracles, either by Deianira or by Astydameia. He was the father of Thrasyanor, grandfather of Antimachus and great-grandfather of Deiphontes. Thersander, son of Agamedidas, is also given as his great-grandson.
Two of the suitors of Penelope, one from Same, and the other from Ithaca. The rich and "lawless" Ctesippus of Same, son of Polytherses, who has 'fabulous wealth' appears in the Odyssey; he mocks the disguised Odysseus and hurls a bull's hoof at him as a 'gift', mocking xenia, though Odysseus dodges this. Telemachus says if he had hit the guest, he would have run Ctesippus through with his spear. Later, in the battle between Odysseus and the suitors, Ctesippus attempts to kill Eumaeus with a spear, but misses due to Athena's intervention, though scratches Eumaeus's shoulder, and is thereupon himself killed by Philoetius, who thus avenges the disrespect towards his master.
