- UNDEFINED - UNDEFINED (1973)
- UNDERWOOD - UNDERWOOD (46)
- URBAN - URBAN (30)
- URBANSKI - URBANSKI (21)
- USSERY - USSERY (16)
- ULRICH - ULRICH (16)
- UNGER - UNGER (14)
- UPCHURCH - UPCHURCH (12)
- UTLEY - UTLEY (12)
- ULLRICH - ULLRICH (11)
- ULMER - ULMER (10)
- USHER - USHER (10)
- ULATOWSKI - ULATOWSKI (9)
- UPTON - UPTON (9)
- URQUHART - URQUHART (9)
- UNDEFIMILESNED - UNDEFIMILESNED (8)
- UHL - UHL (7)
- U - U (6)
- ULM - ULM (6)
- UCKERMARK - UCKERMARK (6)
- UMANS - UMANS (6)
- UNDEFINEDO - UNDEFINEDO (6)
- UNRUH - UNRUH (6)