Hercules/Heracles killed the Nemean Lion and the Hydra.
Hesiod says that the Hydra Lernaia was a daughter of Echidna and Typhon, yes.
During the 12 Labours of Hercules, he killed The Nemean Lion, The Lernean Hydra and The Stymphalian Birds
In most legends the Nemean Lion and the Lernean Hydra are both the offspring of Typhon and Echidna; which makes them siblings.Some legends say that the Nemean lion was the offspring of Zeus and Selene; which makes them cousins instead of siblings.
When Hercules was a baby, he killed two snakes that Hera sent to kill him. He killed the Nemean lion, the hydra, and many other monsters. He also killed his wife and children because Hera made him go crazy.
Hercules killed the hydra, not odysseus
cercerus was the son of typhon and echidna along with hydra, sphinx, ladon, chimera and the nemean lion.
Keto, Typhon, The Nemean Lion, The Chimera, The Hydra etc. etc. etc.
The Lernean Hydra is killed by Heracles in his second of twelve labors. However why the Hydra is killed is never fully explained.
Heracles, more commonly known by his Roman name Hercules. Fought the Lernaean Hydra, as well as, the Nemean Lion, Erymanthian Boar, Cretan Bull, and Stymphalian Birds. He had others labors as well, but they weren't all related to fighting monsters.
He stole the golden apples from the garden of the Hespiredes, he slew the Nemean Lion, the Hydra and many more monsters
He killed the Hydra
In the end it was the Hydra that killed Hercules