| Name | # Entries |
|---|---|
| Zyl | 2371 |
| Zwane | 512 |
| Zulu | 388 |
| Zhang | 302 |
| Zhou | 147 |
| Zondi | 142 |
| Zuma | 134 |
| Zietsman | 126 |
| Zungu | 110 |
| Zhu | 102 |
| Zeelie | 87 |
| Zimmerman | 86 |
| Zeeman | 79 |
| Zondo | 72 |
| Zhao | 72 |
| Zitha | 55 |
| Zaayman | 54 |
| Zijl | 54 |
| Zandberg | 50 |
| Zheng | 47 |
| Zwart | 40 |
| Zwarts | 40 |
| Zikhali | 34 |
| Zikalala | 34 |
| Zimmermann | 32 |
| Zaaiman | 32 |
| Ziervogel | 30 |
| Zhong | 29 |
| Zeng | 29 |
| Zondagh | 28 |
| Zander | 28 |
| Zwiegelaar | 27 |
| Zama | 25 |
| Zimu | 23 |
| Ziegler | 21 |
| Zass | 18 |
| Zulch | 17 |
| Zame | 17 |
| Zenith | 17 |
| Zimba | 16 |
| Zweni | 15 |
| Zibi | 15 |
| Zimri | 15 |
| Zuydam | 15 |
| Zonneveld | 14 |
| Zaal | 14 |
| Zinn | 13 |
| Ziera | 13 |
| Zetler | 13 |
| Zoghby | 13 |
| Zuppicich | 11 |
| Zurich | 11 |
| Zee | 11 |
| Zeiler | 11 |
| Zealand | 11 |
| Zeller | 11 |
| Zwaan | 11 |
| Zylstra | 11 |
| Zen | 11 |
| Zhen | 10 |
| Ziqubu | 10 |
| Zitzke | 10 |
| Zwan | 10 |
| Z | 9 |
| Zion | 9 |
| Zaia | 9 |
| Zacharias | 9 |
| Zou | 9 |
| Zehnder | 8 |
| Zimmer | 8 |
| Ziman | 8 |
| Zwiegers | 8 |
| Zondani | 8 |
| Zero | 8 |
| Zhan | 8 |