1. The ordinal number of thirty-three in counting order
   - 33rd

See also: ordinal

• Robert Barany
• Robert Bartlett
• Robert Benchley
• Robert Boyle
• Robert Brown
• Robert Browning
• Robert Bruce Mathias
• Robert Bunsen
• Robert Burns
• Robert Burns Woodward
• Robert Charles Benchley
• Robert Charles Venturi
• Robert Clive
• Robert Curl
• Robert De Niro
• Robert E Lee Day
• Robert E Lee's Birthday
• Robert E. Lee
• Robert E. Peary
• Robert Edward Lee
• Robert Edwin Peary
• Robert Emmet Sherwood
• Robert F. Curl
• Robert Falcon Scott
• Robert Floyd Curl Jr.