| Naam | Aantal | Naam | Aantal |
|---|---|---|---|
| Ua Conchobair, Ua | 3 | Umfraville, de | 3 |
| Ubbels | 1 | Unen, van | 2 |
| Ucero, d' | 1 | Ungaro | 3 |
| Udekem, d' | 3 | Unger | 2 |
| Udekem d'Acoz, d' | 7 | Ungnad, von | 1 |
| Uden, van | 3 | Unij | 1 |
| Uelen | 1 | Unruh, von | 1 |
| Ufford, de | 2 | Unton | 3 |
| Ughtred | 2 | Upon | 1 |
| Uhrleb | 1 | Urach, von | 5 |
| Uijlenbroek | 2 | Urdangarin Berrichoa | 1 |
| Uijtenhoven | 1 | Urgell, d' | 19 |
| Uilenburg | 2 | Ursel, d' | 3 |
| Uitendaal | 1 | Ursel, van | 3 |
| Uitermark | 1 | Urslingen, von | 2 |
| Uiterwijk | 1 | Urtières, d' | 1 |
| Uitzinger | 1 | Ussel, d' | 1 |
| Ukena | 2 | Uten Engh | 1 |
| Ukena von Moormerland | 1 | Uten Goye | 6 |
| Ulfeldt | 1 | Uten Ham | 2 |
| Ulimann | 1 | Utenhoven, van | 2 |
| Ulme | 2 | Utrecht, van | 1 |
| Ulrichsdal, von | 1 | Uvarov | 1 |
| Umano | 1 | Uvarova | 1 |
| Umeijer | 3 | - | - |