Division number 157 – in the House of Commons on 8 Chwefror 2017.
A majority of MPs agreed and wedi pleidleisio against requiring notice of the UK's withdrawal from the EU to preserve rights acquired in Northern Ireland as a result of European Union membership and against requiring the notification to preserve the right of the people of Northern Ireland determine for themselves if they prefer a union with Great Britain or a sovereign united Ireland.
Eisiau deall mwy am y bleidlais hon? Darllenwch y ddadl yr oedd yn rhan ohoni.