- Robert Nolan
- Robert Norvell
- Robert O'Shea
- Robert Ohnsorge
- Robert Organ
- Robert Orr
- Robert Orth
- Robert Ott
- Robert Ouellette
- Robert Over
- Robert Owen
- Robert O’Sullivan
- Robert Pacha
- Robert Pachence, Jr.
- Robert Pacholewski
- Robert Pacht
- Robert Pardy
- Robert Parnow
- Robert Parzick
- Robert Pauli
- Robert Payne
- Robert Pees
- Robert Pentimonti
- Robert Percival
- Robert Perry
- Robert Peterson
- Robert Petitt
- Robert Petrini
- Robert Phillips
- Robert Phillips
- Robert Picard
- Robert Pick
- Robert Pickering
- Robert Pistilli
- Robert Platek
- Robert Plechinger
- Robert Plesnarski
- Robert Plotkin
- Robert Podvey
- Robert Popeo