| Termen/ Term | Nr. apariții/ No. occurrences |
| UMBRIA | 1 |
| UNGARIA | 1 |
| UTAGAW TOYOKUNI | 1 |
| UDRISTE NASTUREL | 3 |
| UTAGAWA | 1 |
| UBERTI P. | 3 |
| UCRAINA | 25 |
| UDEN LUCAS VAN | 4 |
| UDIA SAKAI | 1 |
| UDVARDJ FLORA | 1 |
| UDVARDY IGNACZ | 2 |
| UEMURA | 1 |
| UGHY ISTVAN | 3 |
| UHDE FRIEDRICH KARL HERMANN VON | 4 |
| UHRENDS KONRAD | 1 |
| UICA GASSERT L. | 8 |
| UITZ BELA | 4 |
| UJHAZY FERENC | 2 |
| UJUARI IGNAC | 1 |
| UJVARI BELA | 1 |
| UKIYO E | 1 |
| UKIYOE | 2 |
| ULBRICH HUGO | 2 |
| ULEA MAUDIA | 2 |
| ULESZKI IMRE | 1 |
| ULINESCU GHEORGHE | 1 |
| ULM | 4 |
| ULMU MATHILDA | 2 |
| ULMU MATILDA | 16 |
| ULPIAN LEON | 1 |
| ULTERIOR | 1 |
| ULUI PE CARTON | 1 |
| UMBACH FR. JULES | 5 |
| UMBACH J. | 8 |
| UMBRIA | 2 |
| UNCHT IOAN | 1 |
| UNGARIA | 39 |
| UNGER WILLIAM | 21 |
| UNGERER IACOB | 1 |
| UNGRO - VLAHIEI | 2 |
| UNGUREANU RODICA | 2 |
| UNIPAN HELGA | 2 |
| UNIUNEA REPUBLICILOR | 1 |
| UNLOGIO F. | 1 |
| UNTCH IOAN | 23 |
| UNTCH ION | 9 |
| UNTERBERGER FRANZ RICHARD | 1 |
| UNVERDORBEN | 2 |
| UPITIS PETERIS | 1 |
| UPJOHN A. M. | 1 |