Use upper case for the full title, like Minister for Economy and Transport, or when used with a name, as a title, like Education Minister Kirsty Williams.
Defnyddiwch briflythrennau ar gyfer y teitl llawn, fel Gweinidog yr Economi a Thrafnidiaeth, neu pan ddefnyddir gydag enw, fel teitl, fel y Gweinidog Addysg Kirsty Williams.