| Termen/ Term | Nr. apariții/ No. occurrences |
| RITTHER ET OSTERWALD | 1 |
| RIVALTA AUGUSTO | 2 |
| RIVALTA G. | 1 |
| RIVIERE HENRI | 1 |
| RIVIERE JOHANES IACOBUS FRANCOIS | 1 |
| RIZZ S. | 1 |
| RIZZI | 1 |
| RK. VR. | 1 |
| ROATA TOMA | 7 |
| ROBAAS | 1 |
| ROBERT E. | 1 |
| ROBERT HUBERT | 2 |
| ROBERT SR. | 1 |
| ROBERT-FLEURY | 1 |
| ROBERTI ERCOLE DE' | 2 |
| ROBERTS PATRICK WILLIAM | 1 |
| ROBINSON H. | 1 |
| ROBINSON JOHN CHARLES | 1 |
| ROBINSON JOHN HENRY | 1 |
| ROBINSONS HENRY | 1 |
| ROBUSTI | 2 |
| ROBUSTI JACOPO | 1 |
| ROCESCUL | 1 |
| ROCET D.C. | 1 |
| ROCHAT | 1 |
| ROCHE ALEXANDRE | 1 |
| ROCHEFORT | 4 |
| ROCHEFORT P. | 5 |
| ROCHEFORT P9 | 1 |
| ROCHEFORT PIERRE | 1 |
| RODDE CARL GUSTAV | 1 |
| RODE CHRISTIAN | 1 |
| RODERSTEIN | 1 |
| RODICA TOTH POIATA | 1 |
| RODIN AUGUSTE | 7 |
| RODOLFFO M | 1 |
| ROEDEL | 1 |
| ROESTI | 1 |
| ROGER LOUIS | 1 |
| ROGOJAN AUGUSTIN | 1 |
| ROGUSKY SONIA | 1 |
| ROH H. R. | 1 |
| ROHBOCH J. | 1 |
| ROHBOCH L. | 1 |
| ROHBOCK L | 5 |
| ROHBOCK L. | 105 |
| ROHBOCK LUDWIG | 59 |
| ROHBOCK LUDWIG (DEL.) | 2 |
| ROHN | 24 |
| ROHN A. | 3 |