The Jedi High Council was made up of twelve Jedi Masters, the most powerful and respected of the Jedi Order, who maintained order throughout the Jedi Temple and sought peace within the Galaxy.
There have been many Jedi to have a seat on the Council, though very few are actually known to history by name. Some of their stories remain mostly unknown, but with each member one thing is for certain - that they were placed there for a reason, and were respected enough to gain their seat.
In order to be on the Council, one would have to be wise and revered, and to have gained the rank of Master, a tradition that was continued until the introduction of the Council's final member, Anakin Skywalker.
The following list will detail the ways in which each canon member of the Jedi High Council found themselves in such a position of power and respect, from the ancient Grand Master Yoda to those who would grow to turn on their old friends.
Some spoilers for the Star Wars movies and TV shows follow.
Because he was so old at the time of his passing, Yoda's past is actually quite mysterious. Though no one knows what species he is or where he came from, what is known is that as a youngling, he was taken to the Jedi Temple on Coruscant and built his lightsaber with the help of Professor Huyang.
A keen meditator with a high attuning to the Force, he attained the rank of Master at the young age of one hundred, and following his own master's death he gained a seat on the Council. In time, he would become the Grand Master of the Jedi Order and is said to have trained over 20,000 Jedi in his near-800 year tenure as a member of the Council.