| Name | # Entries |
|---|---|
| Uys | 376 |
| Ungerer | 62 |
| Upton | 54 |
| Uren | 44 |
| Usher | 38 |
| Urquhart | 32 |
| Underwood | 26 |
| Ure | 25 |
| Unsworth | 22 |
| Ueckermann | 20 |
| Upfold | 18 |
| Urry | 17 |
| Urban | 17 |
| Uddin | 17 |
| Underhill | 16 |
| Unger | 16 |
| Unwin | 16 |
| Urwin | 15 |
| Urlich | 15 |
| Upson | 15 |
| Ullbricht | 14 |
| Udy | 14 |
| Ulrich | 13 |
| Unkovich | 13 |
| Upston | 13 |
| Ung | 12 |
| Upchurch | 12 |
| Upham | 12 |
| Ujdur | 12 |
| Usherwood | 12 |
| Umbers | 11 |
| Uithaler | 11 |
| Uncles | 11 |
| Upjohn | 10 |
| Ubisi | 10 |
| Underhay | 10 |
| Unka | 10 |
| Untiedt | 10 |
| Uhlenberg | 10 |
| Utting | 9 |
| Ulyate | 9 |
| Urbani | 9 |
| Ullrich | 9 |
| Underdown | 9 |
| Ussher | 9 |
| Uden | 8 |
| Ullah | 8 |
| Udemans | 8 |
| Uytenbogaardt | 8 |
| Ualesi | 7 |
| Uppington | 7 |
| Umar | 7 |
| Usmar | 7 |
| Ulberg | 7 |
| Unahi | 7 |
| Uttinger | 6 |
| Usman | 6 |
| Uhlmann | 6 |
| Uy | 6 |
| Ulster | 5 |
| Uka | 5 |
| Ulyatt | 5 |
| Upperton | 5 |
| Uria | 5 |
| Utian | 5 |
| Uttley | 5 |
| Urtel | 5 |
| Udit | 5 |
| Uitenweerde | 4 |
| Utiger | 4 |
| Upoko | 4 |
| Unterslak | 4 |
| Uppink | 4 |
| Ufton | 4 |
| Uluave | 4 |