| Name | # Entries |
|---|---|
| Underwood | 124 |
| Urban | 104 |
| Urquhart | 104 |
| Upton | 94 |
| Udy | 71 |
| Urlich | 71 |
| Ussher | 62 |
| United | 60 |
| Unsworth | 44 |
| Uren | 44 |
| Urwin | 42 |
| Utting | 38 |
| University | 35 |
| Unkovich | 32 |
| Unwin | 32 |
| Ullrich | 27 |
| Upston | 24 |
| Upson | 21 |
| Upper | 20 |
| Unichem | 18 |
| Ure | 18 |
| Ung | 17 |
| U | 16 |
| Universal | 14 |
| Uncle | 12 |
| Underhill | 12 |
| Unique | 12 |
| Upchurch | 12 |
| Usmar | 12 |
| Ujdur | 10 |
| Usher | 10 |
| Ultra Scan | 9 |
| Uhlenberg | 8 |
| Uk | 8 |
| Ulrich | 8 |
| Umbers | 8 |
| Uncles | 8 |
| Union | 8 |
| Unka | 8 |
| Upfold | 8 |
| Usherwood | 8 |
| Ukena | 8 |
| Udc | 7 |
| Uden | 7 |
| Ulberg | 7 |
| Umi | 7 |
| Upadhyay | 7 |
| Uttley | 7 |
| Uy | 7 |
| Ultimate | 6 |
| Ultra | 6 |
| Unahi | 6 |
| Under | 6 |
| Underdown | 6 |
| Underground | 6 |
| Upjohn | 6 |
| Ullah | 5 |
| Ulugia | 5 |
| Unger | 5 |
| Urlwin | 5 |
| Urquhart Hay | 5 |
| U Ti | 5 |
| Umlaw | 5 |
| Uken | 5 |
| U Drive | 4 |
| Uili | 4 |
| Uka | 4 |
| Ula | 4 |
| Um | 4 |
| Unasa | 4 |
| Unternahrer | 4 |
| Urgent | 4 |
| Urs | 4 |
| Uru | 4 |
| Utopia | 4 |