| January | Ionawr |
 |
| February | Chwefror |
|
| March | Mawrth |
|
| April | Ebrill |
|
| May | Mai |
|
| June | Mehefin |
|
| July | Gorffennaf |
|
| August | Awst |
|
| September | Medi |
|
| October | Hydref |
|
| November | Tachwedd |
|
| December | Rhagfyr |
|
| In May | Ym mis Mai |
|
| In January | Ym mis Ionawr |
|