Rosemary Holmes

Rosemary Eurus Holmes is the daughter of Sherlock Holmes and Jane Watson and the younger sister of Rosamund Madison Holmes.

History
Rosemary was concieved in "The Lying Detective," after Sherlock and Jane re-consummate their marriage). After suffering the signs of pregnancy again, Have took a pregnancy test. To her shock, she was pregnant.

Her secrecy is revealed in "The Final Problem", where Jane was manipulated by Eurus to reveal to Sherlock and Mycroft that she was pregnant yet again.

She was later born nine months later