In Disney Canon, Dooku taught Qui-Gon Jin and a jedi named Rael Averross. Both of them were adults, and Qui-Gon was dead, before Dooku left the Jedi Order. Rael was apparently his padawan BEFORE Qui-Gon.
He is a powerful Kaleesh cyborg who has mastered all forms of lightsaber combat under the tutelage of Count Dooku to rival the Force abilities of the Jedi of the Galactic Republic.
Of the three, Darth Vader was Palpatine's favorite "son." Indeed, once Anakin arrived on the scene, both Maul and Dooku became irrelevant to Palpatine's ultimate long-range goals.
The individual was first mentioned, albeit indirectly, in Star Wars: The Force Awakens: The Visual Dictionary that Kylo Ren was Snoke's most gifted apprentice, implying he had trained more than one.
Look, he definitely isn't Mace Windu's son: the age doesn't match, considering the other character's ages (Luke, Leia, Vader, Solo, etc.). However, i think it's possible to see Finn as his grandson, but for that you must consider that Windu had a secret baby close to his time of death.
Billaba became Windu's Padawan and trained under the Jedi Master in the ways of the Force. During her training, Windu allowed her to study Form VII variant known as Vaapad. She eventually became a Jedi Knight, renowned for her skills with a lightsaber and favored Form III when teaching other Jedi.
Although, the two didn't really like each other at first, Yoda and Yaddle eventually grew very close, and over time their relationship even blossomed into a long lasting romance until Yoda's own death. The two had one son, Yoder Minch, a Jedi Master who would have a profound impact during the Yuuzhan Vong War.
Count Dooku's real name, Dooku, was more fitting than his Sith title, Darth Tyranus, as it speaks to his manipulative nature. Dooku played a crucial role in weakening the Jedi and the Republic from within, planting doubt and eroding trust.
Count Dooku was a Force-sensitive Human male Jedi Master who fell to the dark side of the Force and became a Dark Lord of the Sith, known as Darth Tyranus. Born into a noble family on the planet Serenno, he was the heir to vast wealth and the noble title of Count.
As the son of Mother Talzin, the Zabrak male was taken from a young age by Sidious to act as his impressionable apprentice. The boy was raised as Darth Maul, a name he carried throughout his life. In Legends, it was insinuated that he was born "Maul" before attaining the honor of the "Darth" title.
Even though Kylo Ren uses a red lightsaber, harnesses the dark side of the Force, and wears a cape, he is not a Sith. Because of that, he can never hold the title of Darth. Instead, he was just a chaotic mess of the dark side (until he eventually found his way back to the light).
A deadly, agile Sith Lord trained by the evil Darth Sidious, Darth Maul was a formidable warrior and scheming mastermind. He wielded an intimidating double-bladed lightsaber and fought with a menacing ferocity.
Luke Skywalker took on multiple students for training, including Leia Organa, and Rey. Apprentices Voe, Hennix, and Tai studied alongside Ben Solo at Luke's Jedi Temple. Rey was later mentored in the ways of the Force by Leia in a Padawan-like relationship.
Mace Windu is a really stand-out character among the Jedi, and not only because of his signature purple lightsaber and the fact that he's played by Samuel L. Jackson. Windu is pretty dogmatic within the Jedi beliefs, and while that earns him criticism from many fans, it's also something I find can be admirable too.
And then there was a third explanation, the one I thought I'd spotted in my second screening: Finn knew about Rey Palpatine. "You don't know what she's going through," Finn tells Poe after they crash-land the Falcon on Kef Bir, the planet with the horses and the Death Star wreckage. "Leia and I do."
Finn was in love with Rey, or at least fascinated by her as one of the first people he met after breaking his lifelong conditioning. It is unclear whether Rey ever reciprocated his feelings. She never overtly rejected him because he never overtly made a move.
Anakin Skywalker's birth mystery is solved - his mother, Shmi Skywalker, reveals that there was no father and she can't explain what happened. Qui-Gon Jinn believed that the Force itself created Anakin in Shmi's womb, making him the Chosen One who would bring balance to the Force.
However, given that this confirmation was never made into the movie, nor was it ever revisited, the idea that Darth Plagueis created Anakin remains just a theory. The same applies to whether Palpatine created Anakin, which has never been confirmed by the Star Wars canon.
