What is the name of a half goat half human greek mythology creature?

These are called the Greek Heroes. The proper name for them are demigods. The race of heroes included both mythological half-human, half-god figures (usually the result of a divine-human coupling) and historical figures who were raised to divine status after their death. Here are some of the most famous:

• Heracles- the greatest of Greek heroes and almost a god, known for his superhuman strength
• Perseus - beheaded Medusa and inspired the film Clash of the Titans
• Jason - of Argonauts fame
• Theseus - king of Athens who killed the Minotaur with a magic sWord
• Oedipus - accidentally killed his father and slept with his mother
• Achilles - hero of The Iliad and battled the Trojans
• Odysseus - hero of The Odyssey