Not much is known about Amon's youth but he formed a rebelion against the Jedi arround the year 15 BBY (4 ABM). He got injured during an accidant and became a cyborg. His species is unknown.
Amon's name and some of his background story is based on the main villain of the Legend or Korra series. He also let a rebelion and was struck by the explosion of a vehicle but unlike the Haters of the Jedi Amon he was not rebuild as a cyborg and most likely died.