Did Yaddle Survive Order 66?

Their mission was to try to restore peace to the lawless planet. However, Yaddle sacrificed her life for those of the people of Mawan, by using the Force to absorb a bioweapon released by Granta Omega, which killed her instantly.

Is Yaddle Yoda's wife?

The timeline is clear: Yoda is the illicit love child of Yoda and Yaddle, who was a member of the Jedi Council circa The Phantom Menace.

Is Yaddle alive canon?

In the Star Wars Extended Universe (meaning the pre-Disney stuff that's no longer canon), Yaddle actually dies before the Clone Wars. While on a mission with Obi-Wan Kenobi and his then-Padawan Anakin Skywalker, she sacrifices herself to save an entire city from a deadly chemical weapon.