The area where he died has a village, Llangaffo, named after him, as well as the parish church of St Caffo, Llangaffo.
:This article incorporates public domain text from the "Topographical Dictionary of Wales" by Samuel Lewis (1833), the "National Gazetteer of Great Britain and Ireland" (1868), and "Lapidarium walliae: the early inscribed and sculptured stones of Wales" by John Obadiah Westwood (1879).