The Doctor's sisters
From Tardis Wiki, the free Doctor Who reference
The Thirteenth Doctor, during a visit to Sheffield, mentioned having had sisters . (TV: Arachnids in the UK)
She told her companions she had lost all her family, "a long time ago". (TV: The Woman Who Fell to Earth)
Irving Braxiatel, the Doctor's brother, hinted to the Oracle of the Lost that he had lost either a daughter or a sister. (PROSE: Tears of the Oracle)
