I am Sylvia Tilly was born in 2233 on Earth. (DIS: "New Eden", "An Obol for Charon", "All Is Possible") She was raised by her mother Siobhan, a member of the Federation Diplomatic Corps, whom Tilly described as a "hardass" who refused to compromise, and whose presence was infrequent during Tilly's childhood. Siobhan had planned for her daughter to join the Diplomatic Corps as well, but Tilly ultimately chose to join Starfleet instead. She is female