| Name | # Entries |
|---|---|
| Y | 5 |
| Yeats | 4 |
| Yelcich | 4 |
| Yeomans | 4 |
| Yiasoumi | 4 |
| Yortt | 4 |
| Yazbek | 4 |
| Yamamoto | 4 |
| Yallop | 4 |
| Yanko | 4 |
| Yoell | 4 |
| Yankelowitz | 4 |
| Yeager | 4 |
| Yoga | 4 |
| Yellowlees | 4 |
| Yerbury | 4 |
| Yiu | 4 |
| Yvonne | 4 |
| Yvette | 4 |
| Yako | 4 |
| Yelas | 4 |
| Yeoh | 4 |
| Yassin | 3 |
| Yelani | 3 |
| Yaldwyn | 3 |
| Yudelowitz | 3 |
| Yona | 3 |
| Yagambaram | 3 |
| Yeki | 3 |
| Yalden | 3 |
| Yankov | 3 |
| Yesberg | 3 |
| Yumul | 3 |
| Yoli | 3 |
| Yendall | 3 |
| Yerriah | 3 |
| Youthline | 3 |
| Youssef | 3 |
| Younus | 3 |
| Yose | 3 |
| Yzelle | 3 |
| Yabo | 3 |
| Yaldhurst | 3 |
| Yaks | 3 |
| Yeng | 3 |
| Yue | 3 |
| Yiallouris | 3 |
| Yeld | 3 |
| Yiannakou | 3 |
| Yaya | 3 |
| Yeap | 3 |
| Yeom | 3 |
| Yeow | 3 |
| Yudelman | 3 |
| Yeye | 3 |
| Yarn | 3 |
| Yerkovich | 3 |
| Yerra | 3 |
| Yetton | 3 |
| Yenson | 2 |
| Yannoulatos | 2 |
| Yamaguchi | 2 |
| Yamashita | 2 |
| Yamada | 2 |
| Yalda | 2 |
| Yandle | 2 |
| Yelverton | 2 |
| Yemm | 2 |
| Yook | 2 |
| Yourway | 2 |
| Ywca | 2 |
| Yudaken | 2 |
| Yosh | 2 |
| Yzel | 2 |
| Yat | 2 |