R
- Randal MacDonnell, 1st Earl of Antrim (d. 1636), Irish nobleman, 4th son of Sorley Boy MacDonnell
- Randal MacDonnell, 1st Marquess of Antrim (1609–1683), Roman Catholic landed magnate in Scotland and Ireland
- Randal McDonnell, Viscount Dunluce (born 1967), heir to the Earl of Antrim
- Ray MacDonnell (born 1928), American actor
- Richard Graves MacDonnell (1814–1881), Anglo-Irish lawyer, judge, and colonial governor
Read more about this topic: Mc Donnell (surname)