No. Darth Maul is a Zabrak (humanoid with little horns poking out it's head) while Grevious is a Kaleesh. Then Darth Maul can use the force while Grevious may have lightsabers but he can't use the force. Lastly Maul was killed in "The Phantom Menace" two episodes before Greviouses appearance.
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Darth Maul is played by: Ray Park.
darth sidious was the apprentice and darth plagues the wise was the master until sidious killed his master and took on an apprentice of his own, darth maul.
The dark side
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There is no canonical references that explain who Darth Maul originally was. He was taken from him home planet of Iridonia and trained as a Sith by Darth Sidious. He was never a Jedi, and as he gave up his former identity to take the Sith title of 'Darth' his former identity is irrelevant, his tattoos indicate his loyalty to the Sith order. There are popular fan-fiction storied that identify Darth Maul's original name, but these stories are not licensed by Lucasfilm, and are therefore NOT official Star Wars cannon. Until Lucasfilm authorizes a book about Darth Maul's origin it will remain a mystery.