| Termen/ Term | Nr. apariții/ No. occurrences |
| Zaharia, Al. | 149 |
| Zalatarow, B. | 1 |
| Zalău | 2 |
| Zamfirescu, S. | 2 |
| Zamphirolu, G. Al. | 2 |
| Zanesville | 1 |
| Zanoni | 1 |
| Zărnești | 10 |
| Zefkid, S. [inginer hotarnic] | 1 |
| Zeidner, H. | 5 |
| Zeidner, N. | 1 |
| Zeiss, Carl | 1 |
| Zeitheim F. X. | 1 |
| Zelienople | 1 |
| Zelinka | 1 |
| Zenta | 1 |
| Ziegler, Alois | 2 |
| Zielinski, Macsimilian | 1 |
| Zikeli, G. | 1 |
| Zimnicea | 1 |
| Zipser & Fritz | 1 |
| Zipser, K. F. | 19 |
| Zirbeck, C. | 1 |
| Zissu | 1 |
| Zivko Stefanovic | 1 |
| Zlatoust | 6 |
| Zoller | 1 |
| Zotta, Antonio | 1 |
| Zsunk Pal | 1 |
| Zubri | 1 |
| Zurich | 3 |