| U‘zzi |
| Ubaldini, Roger |
| Ubbonites |
| Ubertinus |
| Ubiety |
| Ubiquitarians |
| Ubiquity |
| Ublanizn |
| Uboze |
| Ucal |
| Ucalegon |
| Uckewallists |
| Udainsakr |
| Udall, Ephraim |
| Udall, John |
| Udall, Nicholas |
| Udine, Giovanni da |
| Udine, Girolamo da |
| Udur |
| Udvarde, the Council of |
| Ueberweg, Friedrich |
| Uel |
| Ughelli, Fernando |
| Uginda |
| Ugolino, Blaisio |
| Uhland, Ludwig Joseph |
| Uhle, August Georg |
| Uhlemann, Friedrich |
| Uhlich, Leberecht |
| Ujen |
| Ukko |
| Ukkuma |
| Uknaz |
| Ulai |
| Ulam |
| Ulber, Christian Samuel |
| Ulenberg, Caspar |
| Ulff, Hermann Wilhelm |
| Ulfilas |
| Ulfruna |
| Ulin, John |
| Ulius |
| Ulla |
| Ullan Machaitse |
| Ulldra |
| Uller |
| Ullmann, Karl |
| Ulmann, Karl Christian |
| Ulphilas |
| Ulric of Augsburg |
| Ulrich |
| Ulrich, Jean |
| Ulrici, Hermann |
| Ulrick, Henry |
| Ulster, Synod of |
| Ultimate Appeal to Scripture Authority |
| Ultor |
| Ultramontanists |
| Uma |
| Umbraculum |
| Umbreit, Friedrich Wilhelm Carl |
| Umbrella |
| Ummah |
| Ummah (2) |
| Umuruk |
| Umvin, John Harding |
| Unam Sanctam |
| Unbelief |
| Unbloody Sacrifice |
| Unchangeableness of God |
| Uncial Letters |
| Uncircumcised |
| Unclean |
| Uncleanness |
| Uncles, Joseph |
| Unconditioned Election |
| Unction |
| Unction in Preaching |
| Unction, Extreme |
| Undergird |
| Underhill, James Evan |
| Undersetter |
| Underwood, Alvan |
| Underwood, Henry Beman |
| Underwood, Joseph |
| Undine |
| Ungal |
| Ungchan, John |
| Ungewitter, Reinhard Christoph |
| Unhallowed Uses |
| Uniates |
| Uniciilus |
| Unicorn |
| Uniformity |
| Unigenitus |
| Uniger, Salomon Gottlob |
| Unio Mystica |
| Union American Methodist Episcopal Church, the |
| Union Of Churches |
| Union With Christ |
| Union, Congregational |
| Union, Hypostatical |
| Unitarianism |
| Unitarians |
| Unitas Fratrum |
| United Armenians |
| United Brethren in Christ |
| United Christians of St. Thomas |
| United Copts |
| United Evangelical Church |
| United Methodist Free Church |
| United Nestorians |
| United Original Seceders |
| United Presbyterian Church |
| United Secession Church, the |
| United Society of Believers in Christs Second Appearing |
| United States of America |
| United Synod of the Presbyterian Church |
| United Syrians |
| Unity |
| Unity Of God |
| Unity Of The Church |
| Unity Of The Human Race |
| Universal Bishop |
| Universal Friends |
| Universal German Library |
| Universal Redemption |
| Universalism |
| Universalism (2) |
| Universalists |
| Universality of Grace |
| Universals |
| Universities |
| University |
| Unknown God |
| Unknown Tongue |
| Unlearned |
| Unleavened Bread |
| Unni |
| Unni (2) |
| Unnmfer |
| Unpardonable Sin |
| Unselt, Samuel Friedrich |
| Unterberger, Ignatius |
| Unwin, William Jordan, LL.D |
| Unwritten Word |
| Unxia |
| Unzer, Johann August |
| Upanishad |
| Upfold, George, M.D., D.D., LL.D |
| Upham, Charles Wentworth |
| Upham, Frederic, D.D |
| Upham, Thomas Cogswrell, D.D |
| Upham, William D |
| Upharsin |
| Uphaz |
| Upis |
| Upper Chamber |
| Upsal |
| Upton, James |
| Ur |
| Uraettir |
| Uranius |
| Uranius, Heinrich |
| Uranus |
| Urban I |
| Urban II |
| Urban III |
| Urban IV |
| Urban V |
| Urban VI |
| Urban VII |
| Urban VIII |
| Urbane |
| Urbanenses |
| Urbanis, Guilio |
| Urbino, Salomon ben-Abraham |
| Urbs Beata Hierusalem |
| Urd |
| Urdaborn |
| Urdu Version |
| Urgel, Council of |
| Urgiaffa |
| Uri |
| Uriah |
| Urias |
| Uriël |
| Urii |
| Urijah |
| Urim and Thummim |
| Uriya (or Orissa) Version |
| Urlsperger, Johann August |
| Urlsperger, Samuel |
| Urlus |
| Urquehart, John |
| Urquhart, John F |
| Ursacius |
| Ursicinus |
| Ursins |
| Ursinus |
| Ursinus (Beer), Zacharias |
| Ursinus, Johann Heinrich |
| Urstier |
| Ursula (St.) |
| Ursulines |
| Uru Sukhar |
| Urued |
| Uruker |
| Urwick, William, D.D |
| Usagers and Collegers |
| Ushas |
| Usher (or Ussher), James |
| Usher, John (1) |
| Usher, John (2) |
| Usous |
| Usque, Abrahaim |
| Ussermann, AEmillian |
| Usteri, Leonhard |
| Ustick, Hugh Stewart |
| Ustick, Stephen C |
| Ustur |
| Usuard |
| Usurpation of a Benefice |
| Uta |
| Utanubaden |
| Utdu |
| Utenheim, Christoph Van |
| Utgard |
| Uthai |
| Uthi |
| Utilitarianism |
| Utility |
| Utino, Leonardo Da |
| Utraquists |
| Utrecht, Peace of |
| Utug |
| Uua |
| Uury |
| Uwienon, Council of |
| Uytenbogaert (Uytenbogard, Wytenbogard), Hans |
| Uythage, Conrad Cornelius |
| Uz |
| Uza |
| Uzai |
| Uzal |
| Uzza |
| Uzza, The Garden Of |
| Uzzah |
| Uzzen-sherah |
| Uzzen-sherah (2) |
| Uzzia |
| Uzziah |
| Uzziel |
| Uzzielite |
