in all regions of Wales, significantly more house names are changed from English to Welsh or Welsh to Welsh than from English to English or Welsh to English
ym mhob rhanbarth o Gymru, mae llawer mwy o enwau tai yn cael eu newid o’r Saesneg i’r Gymraeg neu o’r Gymraeg i’r Gymraeg nag o'r Saesneg i’r Saesneg neu o’r Gymraeg i'r Saesneg