Saint Cybi (Welsh), or Cuby (Cornish), was a 6th-century Cornish bishop, saint, and, briefly, king, who worked largely in Cornwall and North Wales: his biography is recorded in two slightly variant medieval 'lives'.

November 8

• Cuby
• Cornwall Landulph
• Cornwall Llangibby
• Monmouthshire
• Wales Llangybi
• Cardigan
• Wales Tregony
• Cornwall Kenwyn
• Cornwall

483

8 November 555

Canonized

11

8