| Name | # Entries |
|---|---|
| Uys | 462 |
| Underwood | 152 |
| Upton | 141 |
| Urquhart | 123 |
| Urban | 113 |
| Urlich | 71 |
| Udy | 71 |
| Ussher | 66 |
| Uren | 62 |
| Ungerer | 60 |
| United | 60 |
| Usher | 47 |
| Unsworth | 47 |
| Ure | 45 |
| Urwin | 43 |
| Utting | 40 |
| University | 35 |
| Unwin | 34 |
| Unkovich | 32 |
| Ueckermann | 31 |
| Ullrich | 28 |
| Upson | 24 |
| Upston | 24 |
| Underhill | 23 |
| Upper | 20 |
| Ung | 18 |
| Ulrich | 18 |
| Unichem | 18 |
| U | 16 |
| Upfold | 15 |
| Uddin | 15 |
| Universal | 14 |
| Upchurch | 13 |
| Unger | 13 |
| Usmar | 13 |
| Unique | 12 |
| Uncle | 12 |
| Underhay | 11 |
| Ujdur | 10 |
| Ultra Scan | 9 |
| Ulyate | 9 |
| Umar | 9 |
| Uk | 8 |
| Umbers | 8 |
| Udemans | 8 |
| Ukena | 8 |
| Uncles | 8 |
| Union | 8 |
| Unka | 8 |
| Uttley | 8 |
| Uhlenberg | 8 |
| Usherwood | 8 |
| Uy | 8 |
| Upadhyay | 7 |
| Uden | 7 |
| Ullah | 7 |
| Umi | 7 |
| Udc | 7 |
| Ulberg | 7 |
| Uytenbogaardt | 7 |
| Ultimate | 6 |
| Underground | 6 |
| Ulster | 6 |
| Ultra | 6 |
| Upjohn | 6 |
| Under | 6 |
| Underdown | 6 |
| Unahi | 6 |
| Urry | 5 |
| Urlwin | 5 |
| Unthank | 5 |
| U Ti | 5 |
| Utton | 5 |
| Utian | 5 |
| Umlaw | 5 |