| Name | Total | Name | Total |
|---|---|---|---|
| Udd | 9 | Ungern | 1 |
| Uddström | 1 | Unhola | 2 |
| Udelius | 2 | Unhonen | 3 |
| Uggeldahl | 1 | Unhonkumpu | 1 |
| Uggla | 1 | Unkila | 2 |
| Uhlbäck | 2 | Unkuri | 1 |
| Uhr | 2 | Unnanlahti | 1 |
| Uhrman | 1 | Unnasjärvi | 2 |
| Uhrnberg | 1 | Unnaslahti | 2 |
| Uihero | 2 | Untinen | 2 |
| Uikkonen | 2 | Uola | 4 |
| Uimarihuhta | 2 | Uolamo | 1 |
| Uimi | 2 | Uosikkinen | 2 |
| Uimonen | 24 | Uosukainen | 5 |
| Uisma | 1 | Uoti | 5 |
| Uittamo | 1 | Uotila | 40 |
| Uittin | 2 | Uotinen | 19 |
| Uitto | 16 | Upas | 1 |
| Uittomäki | 2 | Upero | 1 |
| Uittoniemi | 1 | Upla | 1 |
| Uitus | 3 | Upola | 2 |
| Ujanen | 1 | Uppa | 4 |
| Ujonen | 1 | Uppgård | 1 |
| Ukko | 2 | Uppman | 1 |
| Ukkola | 23 | Uravirta | 1 |
| Ukkolin | 1 | Uravuori | 1 |
| Ukkonen | 43 | Uren | 1 |
| Ukonaho | 1 | Urho | 1 |
| Ukonmaanaho | 1 | Urhola | 2 |
| Uksila | 4 | Urhonen | 2 |
| Ukura | 2 | Urjansson | 1 |
| Ulanto | 1 | Urkko | 1 |
| Ulaska | 2 | Urmas | 1 |
| Ulenius | 1 | Uro | 2 |
| Uljas | 5 | Urolainen | 1 |
| Uljonen | 1 | Uronen | 5 |
| Ulkoniemi | 1 | Urpalainen | 4 |
| Ulkuniemi | 3 | Urpanen | 3 |
| Ullakko | 3 | Urpasalo | 1 |
| Ullgren | 3 | Urpelainen | 1 |
| Ullvén | 1 | Urpiainen | 1 |
| Ulmala | 1 | Urpilainen | 3 |
| Ulmanen | 8 | Urpo | 1 |
| Ulvi | 2 | Urpola | 1 |
| Ulvila | 1 | Urponen | 1 |
| Ulvinen | 7 | Urrila | 1 |
| Ulvo | 3 | Ursin | 3 |
| Ummela | 1 | Urtjeff | 1 |
| Under | 2 | Usatscheff | 1 |
| Unger | 1 | Uschanoff | 2 |