Obi-Wan Kenobi was born in 57 BBY, the first son of a moderately wealthy family, and was taken to Coruscant to begin his Jedi training shortly thereafter. His homeworld was Stewjon, from which Kenobi had vague, pleasant memories of playing with his brother, Owen, in a green, grassy area. It is recorded that Kenobi might have occasionally visited Owen and the rest of the Kenobi family later in his life.
Qui-Gon Jinn was a revered, yet maverick and unconventional Human male Jedi Master. He was the Padawan to Count Dooku, and the mentor to Obi-Wan Kenobi and briefly Anakin Skywalker. Jinn often placed himself in conflict with the Jedi High Council. He was deeply attuned to the Living Force, which contributed to him frequently taking side trips to help seemingly weak and useless life-forms. Despite his opposition to the council, he was regarded by many Jedi as sharp-witted and possessing great wisdom.
Depa Billaba was a female Chalactan Jedi Master serving the Jedi Order during the final years of the Republic Classic era. Trained by Master of the Order Mace Windu and appointed to the Jedi High Council, Billaba was considered one of the most enlightened Jedi of her time and had earned her seat on the High Council. Having mastered the difficult Vaapad lightsaber form created by Mace Windu, she became one of its few practitioners and one of only three masters of the form.
Plo Koon was a Kel Dor male from the planet Dorin who became a Jedi Master and a lifetime member of the Jedi High Council, holding the position from after the Stark Hyperspace War to the end of the Galactic Republic in 19 BBY. During the Clone Wars, Koon served as a Jedi General in the Grand Army of the Republic, leading soldiers in campaigns, fighting on Geonosis and at Kaliida Shoals amongst others. Koon was also an accomplished starfighter pilot.
Mace Windu was a male Korun Jedi Master of legendary status who was the Master of the Order in the days leading up to the Battle of Geonosis, after which he gave the title to Grand Master Yoda. Hailing from the world of Haruun Kal, Mace Windu served as one of the last members of the Jedi High Council before the Great Jedi Purge. Serving on the Council, Windu was often regarded as second only to the Grand Master Yoda, though Windu was eight centuries Yoda’s junior. Windu’s wisdom and power were considered legendary by many, as were the weight of his words.
A Jedi was a member of the Jedi Order, who studied, served and used the mystical energies of the Force; usually, the light side of the Force. The weapon of the Jedi was the lightsaber, a weapon with a blade made of pure energy. The Jedi fought for peace and justice in the Galactic Republic, usually against their mortal enemies, the Sith and Dark Jedi, who studied the dark side of the Force. (Source Wookieepedia)