| Name | # Entries |
|---|---|
| Zhou | 2060 |
| Zhao | 1986 |
| Zhu | 1817 |
| Zheng | 1412 |
| Zammit | 1185 |
| Zhong | 664 |
| Zeng | 557 |
| Zhuang | 334 |
| Zou | 302 |
| Zimmermann | 282 |
| Zappia | 262 |
| Zimmerman | 217 |
| Zhan | 178 |
| Zhen | 174 |
| Zellers | 154 |
| Zito | 130 |
| Zanders | 124 |
| Ziebell | 123 |
| Zaman | 117 |
| Zaidi | 107 |
| Zappala | 96 |
| Zielke | 91 |
| Zwart | 89 |
| Zeidan | 88 |
| Zunker | 82 |
| Zang | 80 |
| Zafar | 79 |
| Zylstra | 77 |
| Zanetti | 77 |
| Zollo | 74 |
| Zamani | 69 |
| Ziebarth | 68 |
| Zanella | 68 |
| Zervos | 68 |
| Zahner | 64 |
| Zajac | 59 |
| Zacher | 59 |
| Zalewski | 57 |
| Zoch | 53 |
| Zeidler | 53 |
| Zara | 51 |
| Zeman | 50 |
| Zurek | 49 |
| Zimmerle | 48 |
| Zinke | 45 |
| Zuber | 43 |
| Zee | 42 |
| Zangari | 42 |
| Zyla | 41 |
| Zupan | 40 |
| Zullo | 39 |
| Zappone | 39 |
| Zaccaria | 38 |
| Zuidema | 37 |
| Zelinsky | 36 |
| Zawadzki | 35 |
| Zanoni | 35 |
| Zerbe | 34 |
| Zucco | 32 |
| Zambrano | 31 |
| Zamudio | 31 |
| Zinn | 31 |