Deugain Merthyr Lloegr a Chymru

Deugain Merthyr Lloegr a Chymru yw'r term a ddefnyddir am ddeugain o ferthyron Catholig a ganoneiddiwyd ar 25 Hydref 1970 gan Pab Pawl VI i gynrychioli'r holl Gatholigion a ferthyrwyd yn Lloegr a Chymru rhwng 1535 a 1679.

 Sant John Almond
 Sant Edmund Arrowsmith
 Sant Ambrose Barlow
 Sant John Boste
 Sant Alexander Bryant
 Sant Edmund Campion
 Sant Margaret Clitherow
 Sant Philip Evans
 Sant Thomas Garnet
 Sant Edmund Gennings
 Sant Richard Gwyn
 Sant John Houghton
 Sant Philip Howard
 Sant John Jones Sant John Kemble
 Sant Luke Kirby
 Sant Robert Lawrence
 Sant David Lewis
 Sant Anne Line
 Sant John Lloyd
 Sant Cuthbert Mayne
 Sant Henry Morse
 Sant Nicholas Owen
 Sant John Payne
 Sant Polydore Plasden
 Sant John Plessington
 Sant Richard Reynolds
 Sant John Rigby Sant John Roberts
 Sant Alban Roe
 Sant Ralph Sherwin
 Sant John Southworth
 Sant Robert Southwell
 Sant John Stone
 Sant John Wall
 Sant Henry Walpole
 Sant Margaret Ward
 Sant Augustine Webster
 Sant Swithun Wells
 Sant Eustace White

Categori:Merthyron Catholig
Categori:Cristnogaeth yn Lloegr
Categori:Cristnogaeth yng Nghymru