Shamima Begum – Wikipedia

Shamima Begum (born 25 August 1999) is a British born woman who left the UK aged 15 to join the Islamic State of Iraq and the Levant (ISIL) in Syria. Her intention to return to the UK in 2019 resulted in a public debate about the handling of returning jihadists.

https://en.wikipedia.org/wiki/Shamima_Begum