The numbers of males aged three years or older who are able to speak Welsh also fell from 261,720 in the 2011 Census to 249,750 in the 2021 Census.
Bu hefyd ostyngiad yn niferoedd y dynion tair oed neu'n hŷn sy'n gallu siarad Cymraeg o 261,720 yng Nghyfrifiad 2011 i 249,750 yng Nghyfrifiad 2021.