Kostanza Dooku was a female Human from the planet Serenno. She belonged to one of the Great Houses, the six wealthiest noble families on her homeworld. She married the Count of House Dooku, brother to the famed Jedi Master Dooku. When her husband died, Kostanza Dooku served as regent over their House. She was to hold this position until her son, Adan Dooku, came of age. Circa 32 BBY, however, her brother-in-law resigned his position within the Jedi Order and claimed his family title as Count.