3 canlyniad
Rhestrir y canlyniadau yn ôl perthnasedd.
Cymraeg: Syndrom Down
Saesneg: Downs Syndrome
Cymraeg: Cymdeithas Syndrom Down
Saesneg: Down's Syndrome Association
Cymraeg: Ymddiriedolaeth Addysg Syndrom Down
Saesneg: The Down's Syndrome Educational Trust