In Wales, the percentage of multiple-ethnic group households ranged between 2.5% of all households in Blaenau Gwent and 11.6% in Cardiff.
Yng Nghymru, roedd canran y cartrefi â grwpiau amlethnig yn amrywio rhwng 2.5% o’r holl gartrefi ym Mlaenau Gwent a 11.6% yng Nghaerdydd.