Mim Twm Llai is a celebrated Welsh language music act formed by the noted musician and songwriter Myrddin ap Dafydd, hailing from the heartland of the Welsh music scene. Ap Dafydd, who is also a renowned poet and publisher, has been the creative force behind Mim Twm Llai, bringing a unique blend of rock, folk, and traditional Welsh music to a devoted following. The project showcases his commitment to the Welsh language and culture, a passion that is deeply interwoven throughout his artistic endeavors.

Mim Twm Llai's musical oeuvre has been marked by a series of well-received releases that emphasize the richness of Welsh musical heritage while maintaining a modern edge. Among their notable works, "Goreuon," "Yr Eira Mawr," and "Straeon Y Cymdogion" stand out, exemplifying the band's versatility and the emotive depth of their compositions. Each album offers a comprehensive look at their distinct sound, characterized by poignant lyrics, intricate melodies and a genuine embodiment of the spirit of Wales. As a pivotal figure in the Welsh language music scene, Mim Twm Llai has not only entertained but also played a critical role in keeping the region's music traditions vibrant and relevant in the contemporary music landscape.