| Name | # Entries |
|---|---|
| Urquhart | 810 |
| Upton | 800 |
| Underwod | 768 |
| Usher | 516 |
| Unwin | 436 |
| Ung | 341 |
| Uren | 271 |
| Unsworth | 230 |
| Unger | 220 |
| Uebergang | 209 |
| Underhill | 190 |
| Urban | 166 |
| Ure | 152 |
| Uddin | 150 |
| Underwood | 136 |
| Utting | 133 |
| Ullah | 121 |
| Unicomb | 113 |
| Ugle | 108 |
| Upson | 106 |
| U'ren | 102 |
| Upston | 102 |
| Ussher | 101 |
| Underdown | 99 |
| Uy | 99 |
| Upadhyay | 97 |
| Urwin | 85 |
| Ulrich | 80 |
| Uppal | 76 |
| Uhlmann | 74 |
| Ursino | 70 |
| Usman | 68 |
| Unthank | 67 |
| Upward | 63 |
| Umbers | 62 |
| Unal | 60 |
| Um | 58 |
| Ullrick | 57 |
| Udy | 56 |
| Uzelac | 55 |
| Uhr | 54 |
| Utz | 54 |
| Urry | 52 |
| Upham | 51 |
| Urbano | 50 |
| Ud Din | 49 |
| Umback | 47 |
| Uphill | 47 |
| Umar | 46 |
| Urch | 45 |
| Uebel | 45 |
| Un | 45 |
| Uys | 45 |
| Ulrick | 45 |
| Ugarte | 45 |
| Undy | 41 |
| Upcroft | 40 |
| Urbanski | 40 |
| Uden | 39 |
| Urbaniak | 39 |
| Unkovich | 39 |
| Utley | 39 |
| Uttley | 38 |
| Uysal | 38 |
| Unmack | 37 |
| Uhe | 37 |
| Uzzell | 36 |
| Ullman | 32 |
| Utber | 32 |
| Urrutia | 31 |
| Upchurch | 31 |
| Uglow | 31 |
| Uhrig | 31 |
| Ungerer | 31 |
| Ubrihien | 31 |