Rebecca Thomas is an author and historian who lives in Cardiff. Her literary essay ‘Cribo’r Dragon’s Back’ won the inaugural O’r Pedwar Gwynt essay prize (2021). Her first novel for young adults Dan Gysgod y Frenhines was published by Gwasg Carreg Gwalch in 2022. She studied history at Cambridge University, before gaining a doctorate in Anglo-Saxon, Norse and Celtic there. Currently she works as a British Academy post-doctoral researcher in the School of Welsh, Cardiff University. Her monograph on medieval identity History and Identity in Early Medieval Wales was published by Boydell & Brewer in 2022 and she has published widely on different aspects of medieval Wales.