- Ancestry.co.uk Surname Board - U - Free Database for thousands of surnames
- Ussery / Usry / Usery - including affiliated families.
- Upshaw - including alternate spellings such as Upcher, Upshur, Upsher, and Upshire.
- Umstead / Umstat
- Urquhart
- Ullstad, Ullestad, Ulstad - contain relatives of Knut Magneson Ullestad who lived outside Voss, Norway, in the 17th century.
- Ursel - contains historical and genealogical information.
- Uptegrove