Muiris Ó Begléighinn (died 1528) was an Irish physician. The Annals of Connacht, sub anno 1528, record his obit. Muiris son of Donnchad O Begleighinn, an eminent physician, died, with Unction and Penance. The Annals of Loch Cé for the same year records Muiris, son of Donnchadh Ó Beigléighinn, an adept in medicine, who died this year. The surname is now generally rendered as Beglan or Beglin.