Barbara Campbell

Barbara Campbell was the adopted daughter of David Campbell and his Gallifreyan wife, Susan Campbell.

Biography
Orphaned in the Dalek Invasion of Earth in the 22nd century, she was adopted by David and Susan after the human victory. She was named after Barbara Wright, an early companion of Susan's grandfather, the First Doctor.

She also had two adopted brothers, Ian Campbell and David Campbell Junior. (EDA: Legacy of the Daleks) Some time after David Junior was adopted, David and Susan conceived a child whom they named Alex Campbell. Alex was, on some level, Barbara's youngest brother. (BFA: An Earthly Child)