Lleucu Gwenllian is an author-illustrator from Blaenau Ffestiniog currently based in Macedonia. She has illustrated many books for children including the Gwyliau Gwirion Cwm Cawdel series (Gwennan Evans), Llanddafad (Gareth Evans-Jones) and Deg o Chwedlau Dyffryn Conwy (Myrddin ap Dafydd). In 2025 she published her first graphic novel, Gwen ac Arianrhod, with Gwasg Carreg Gwalch, which went on to win the 2026 Tir Na N’Og award in the Welsh secondary category.
