| Cabar feidh | | The antlers of the deer (Gael.) |  | 72 Highlanders | |
| Carry on | |
| Cede nullis | |
| Celer et audax | | Swift and bold (L.) |  | KRRC | |
| Celer et fortis | | Swift and strong (L.) |  | BCR | |
| Certa cito | | Swift and sure (L.) |  | Royal Signals | |
| Cos Cheum Nach Gabh Tilleadh | |
| Courage | |
| Cuidich 'n Righ | Help to the King (Gael.) Orthography changed 1869 by WO Order from "Cuidich 'n Rhi". According to legend, Colin , Lord Kintail, ancestor of Mackenzies of Seaforth, creid this while saving Alexander III from an angry stag. |  | Highlanders, QO Hlders, Seaforth, 78 Hlders |  | Seaforth of Canada | |
| Cymru am Byth | |