On December 29, 2020 His Holiness Pope Francis appointed the Most Rev. Dermot Farrell (66), a priest of the Diocese of Meath and since 2018 Bishop of Ossory, Ireland to be the 51st Metropolitan Archbishop of Dublin. He succeeds Abp. Diarmuid Martin.
He had already assumed a coat of arms as Bishop of Ossory. The image below is not official but was a cut and paste job by me to see what his arms as archbishop will look like. In Ireland the archbishops of Armagh (who is the Primate of All Ireland) and of Dublin (who is the Primate of Ireland) use arms of the See that appear identical because this stems from a time when all archbishops tended to use arms depicting a pall (pallium) and a cross as symbols of being an archbishop. The archiepiscopal insignia then later became associated with certain metropolitical & archiepiscopal sees and it remains so to this day, including some (like the Church of Ireland Diocese of Dublin, or the Anglican Archbishop of Canterbury) where it seems particularly incongruous. This is because the pallium is worn by Roman Catholic Metropolitan Archbishops as a symbol of sharing in the ministry of the Bishop of Rome (the Pope) and, as such, they receive it from him as a sign of their office.
Below we see what Archbishop Farrell’s coat of arms may well look like (or something close to this). I note that his predecessor, App. Martin, did not use a coat of arms.