| Name | # Entries |
|---|---|
| U' | 15 |
| Ua | 15 |
| Umlauf | 15 |
| Urand | 15 |
| Undery | 15 |
| Uchtman | 14 |
| Uppington | 14 |
| Usai | 14 |
| Us | 14 |
| Umana | 14 |
| Usback | 14 |
| Urbach | 14 |
| Uhlman | 13 |
| Ulcoq | 13 |
| Urbanavicius | 13 |
| Uhatafe | 13 |
| Ulstrup | 13 |
| Ut | 13 |
| Uremovic | 13 |
| Ustick | 12 |
| Uyanik | 12 |
| Uhrhane | 12 |
| Ungermann | 12 |
| Ui | 11 |
| Uk Uk | 11 |
| Ulbricht | 11 |
| Ulliana | 11 |
| Uwins | 11 |
| Urzia | 11 |
| Uzunovski | 11 |
| Unlu | 11 |
| U | 11 |
| Uguz | 11 |
| Umstad | 11 |
| Uruz | 11 |
| Ubaldi | 11 |
| Ubank | 11 |
| Ucich | 10 |
| Ulker | 10 |
| Urzi | 10 |
| Urbanczyk | 10 |
| Ullmann | 10 |
| Uechtritz | 10 |
| Ugonotti | 10 |
| Ulusoy | 10 |
| Usami | 10 |
| Ugolini | 10 |
| Upfill | 10 |
| Uberti | 10 |
| Udovcic | 9 |
| Uhlik | 9 |
| Ulm | 9 |
| Umansky | 9 |
| Urbanek | 9 |
| Ussing | 9 |
| Udovich | 9 |
| Ulpen | 9 |
| Urukalo | 9 |
| Ushakov | 9 |
| Utami | 9 |
| Uyar | 9 |
| Ujcic | 9 |
| Uppu | 9 |
| Utano | 9 |
| Uzabeaga | 9 |
| Ugov | 9 |
| Ullucci | 9 |
| Upfield | 9 |
| Uzarevic | 9 |
| Universita | 9 |
| Unaeze | 9 |
| Usha | 9 |
| Ulahannan | 9 |
| Ullock | 8 |
| Ungvari | 8 |