Who married Android 19?
A beautiful and highly intelligent scientist and part of the wealthiest family in the world. She is the daughter of Dr. Brief, the founder of the Capsule Corporation. She meets Goku while searching for the Dragon Balls, and eventually marries Vegeta and has two children.
How did Android 17 have a kid?
She was human once but Dr.Gero remodeled her and added cybernetics. Gero left her human enough to conceive a child.
Is FighterZ canon?
Dragon Ball FighterZ is known to be a non-canon story, while Dragon Ball Z: Kakarot is said to feature new canon backstories.