The Whitesun lineage resided on the desert world of Tatooine. By the time of the Clone Wars, the Whitesuns had spent three generations as moisture farmers, achieving renown as the most skilled in the vicinity of Mos Eisley.
The Whitesun family encompassed the brothers and sisters Beru, Dama, Haro, and possibly Coolie.
After Anakin Skywalker transformed into Darth Vader, his offspring, Luke Skywalker, was raised by Beru and her spouse, Owen Lars. In 0 BBY, Owen and Beru, known to Luke as "Uncle Owen" and "Aunt Beru," met their demise at the hands of Imperial stormtroopers.
The surname Whitesun initially surfaced in a comparable spelling as the last name of Clieg Whitsun within the original film's rough draft.