The Doctor's sisters

During a visit to Sheffield, the Thirteenth Doctor mentioned having had sisters, (TV: Arachnids in the UK) after previously telling 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)

One account stated that the Doctor never had an older sister. (PROSE: Dragonfire) Doktorovy sestry