St. Maches was a 6th-century princess and Pre-congregational saint of Cornwall and Devon. Maches was the sister of St. Cadog. Saint Maches at CatholicSaints.Info.Brian Daniel Starr, The Life of Saint Brychan: King of Brycheiniog and Family (Brian Daniel Starr, 2008 ) p80.

Born a daughter of Saint Gwynllyw and his wife Gwladys, Maches lived as a hermit, and was murdered by thieves,Princess Maches of Gwynllwg. at Merthyr Maches (Llanfaches in the Kingdom of Gwent).Hando, F.J., "Out and About in Monmouthshire", (R. H. Johns, Newport, 1958). She was buried in the monastery at Caerwent, now the parish church of St. Stephen at Caerwent,Caerwent Church Home of St. Tathyw.Saints of Newport-Children of Gwynlliw-St Maches of LLANVACHES St Cynydir, St Bugi. by Saint Tathan to whom the bandits had confessed the crime.

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