Anakin Skywalker: Whose helmet is that anyway?

Mace Windu: It belongs to a bounty hunter I killed on Geonosis, by the name of Jango Fett.

Anakin Skywalker: You mean the clone template?

Mace Windu: Yes. Strangely enough he had a son, or at least a clone he regarded as a son. His name is Boba Fett.

Anakin Skywalker: I remember now. Obi-Wan listed him in his report on Kamino.

Mace Windu: Boba was on Geonosis when his father died. He watched as I killed him.

Anakin Skywalker: That would complicate things.

Mace Windu: Indeed.

From Star Wars: The Clone Wars – Season 2 Episode 21: ‘R2 Come Home’ (2×21)