| U+ | art-254 |
| 211D | |
| Unicode Character Names | art-315 | DOUBLE-STRUCK CAPITAL R |
| Unicode Character Names | art-315 | DOUBLE-STRUCK R |
| American English | eng-004 | DOUBLE-STRUCK CAPITAL R |
| français | fra-000 | L’ENSEMBLE DES NOMBRES RÉELS |
| français | fra-000 | R MAJUSCULE AJOURÉ |