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Definition: Yn achos trethdalwyr yng Nghymru, cyfraddau'r elfen a godir gan Lywodraeth Cymru o fewn cyfanswm y dreth incwm a delir.
Notes: Dyma'r acronymau a ddefnyddir ar gyfer Welsh Rates of Income Tax / Cyfraddau Treth Incwm Cymru. Gweler y cofnod am y term llawn am ddiffiniad a nodyn defnydd.