1. Yapp
2. Yaqoob
3. Yaqub
4. Yarde-Buller
5. Yardley
6. Yarker
7. Yarnell
8. Yarwood
9. Yasin
10. Yate
11. Yates
12. Yeaman
13. Yeats
14. Yeldham
15. Yelin
16. Yelland
17. Yellen
18. Yellowlees
19. Yelverton
20. Yeo
21. Yeoman
22. Yeomans
23. Yeoward
24. Yeowart
25. Yerburgh
26. Yerolemou
27. Yexley
28. Yildiz
29. Yip
30. Y'Mech
31. Yngvisson
32. Yogalingam
33. Yogenstein
34. Yolland
35. Yonge
36. York
37. Yorke
38. York-Williams
39. Yorstoun
40. Youles
41. Young
42. Younger
43. Younger-Ross
44. Youngson
45. Yousuf
46. Yoxall
47. Yuill