un ar ddeg - 11, deuddeg - 12, tri/tair ar ddeg - 13, pedwar/pedair ar ddeg - 14, pymtheg - 15, un ar bymtheg - 16, dau/dwy ar bymtheg - 17, deunaw - 18, pedwar/pedair ar bymtheg - 19, ugain - 20, un ar hugain - 21, dau/dwy ar hugain - 22, tri/tair ar hugain - 23, pedwar ar hugain - 24, pump ar hugain - 25, chwech ar hugain - 26, saith ar hugain - 27, wyth ar hugain - 28, naw ar hugain - 29, deg ar hugain - 30,

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