Encyclopedias, Almanacs, Transcripts, and Maps
- Universa Laus
- Universalists
- Universals
- Universe, Order of
- University of Judaism, The (UJ)
- Unjust Enrichment
- Unleavened Bread (in the Bible)
- Unna, Paul Gerson
- Unni of Hamburg, St.
- Unscop
- Unterlinden, Convent of
- Unterman, Isser Yehuda
- Untermeyer, Louis
- Untermyer, Samuel
- Upagupta
- Upali
- Upaya
- Urbach, Ephraim Elimelech
- Urban I, Pope, St.
- Urban II, Pope, Bl.