| Sport: | Water polo |
| Birth Date: | 8 August 1950 |
| Birth Place: | Rotterdam, Netherlands |
Martinus ("Mart") Rokes Bras (born 8 August 1950) is a former water polo player from The Netherlands, who finished in seventh position with the Dutch Men's Water Polo Team at the 1972 Summer Olympics in Munich. Later on Bras became an international water polo referee.