Ss Illtyd, Gwyno, and Dyfodwg's Church, Llantrisant; St Illtyd, St Gwyno, and St Dyfodwg's Church, Llantrisant; Church of Saints Illtyd, Gwyno and Tyfodwg, Llantrisant

The National Monuments Record of Wales records Ss Illtyd, Gwyno, and Dyfodwg's Church, Llantrisant; St Illtyd, St Gwyno, and St Dyfodwg's Church, Llantrisant; Church of Saints Illtyd, Gwyno and Tyfodwg, Llantrisant as Church from the Medieval; Post Medieval period. The saved point comes from the official national record. Inclusion does not by itself mean that the public may enter the place.

The church is dedicated to three saints, Illtyd, Gwyno, and Dyfodwg, and is likely of early medieval origin, reflecting the tradition of dedicating Welsh churches to local or regional saints. Its significance lies in its connection to the early Christian heritage of Glamorgan, though specific builders and exact construction dates remain unrecorded.