For more information on how to do that or on data linking, then please contact us on 0300 025 6682 or welshlanguagedata@gov.wales.
I gael rhagor o wybodaeth am sut i wneud hynny, neu ar gysylltu data, cysylltwch â ni ar 03000 256682 neu swyddogdiogeludata@llyw.cymru.