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| Ronald E. Osborn | M | | What do we mean by the Disciples mind? | |
| T. H. Osborn | | | Let me go where Jesus calls me | |
| E. Osborne | | | Ten virgins went forth | |
| E. L. Osborne | | | The saloon keepers all may be very nice | |
| Gena Osborne | | | When life is bright and the world is luring on | |
| Richard Osborne | M | | Keep the banner flying, this your cry | |
| Stanley L. Osborne | M | 1907 - | All baptized beneath the cloud | ARFON |
| T. R. Osborne | | | Holy Spirit, dove of heaven | |
| James Osbourn | M | | | |
| Oscar II of Sweden | | | Fader, se i nad hit neder | |
| F. Oser | M | | All that God may give to thee | |
| Frances S. Osgood | | | Approach not the altar with gloom in thy soul | |
| George Osgood | M | | Adown the mountain's glowing side | |
| George L. Osgood | M | | Grant us to do with zeal | |
| Howard C. Osgood | M | | In the days of old when the feet of Christ | |
| J. Osgood | | | | |
| J. R. Osgood | | | Come and bring your gifts | |
| Mabel G. Osgood | F | | The buds are bursting on the trees | |
| May Agnes Osgood | F | | I knelt by my mother | |
| Osgood, Samuel | | | | |
| A. O'Shaughnessy | | | With wonderful deathless ditties | |
| Judy O'Sheil | F | | [Peace Song] | |
| Mary Grant O'Sheridan | F | | For all thy gentle guidance, Lord | |
| Michael O'Shields | M | | I will call upon the Lord who is worthy to be praised | |
| Lucas Osiander | | | Herr, deine Rechte und Gebot, Darnach wir sollen leben | |
| Lucas Osiander, 1534-1604 | M | 1534 -- 1604 | When Jesus went to Jordan's stream | CHRIST UNSER HERR ZUM JORDAN KAM |
| Logan Oskin | | | Hail, Columbia, proud thy banner | |
| Edward Osler | M | 1798 -- 1863 | Praise the Lord: ye heavens adore him | FABEN |
| S. J. Oslin | | | Beyond the chilly winds | |
| S. J. Osling | | | | |
| E. K. Osmotherly | U | | | |
| Eliza K. Osorio, 1898- | F | 1898 - | E malama, ho'omaika'i | [E malama, ho'omaika'i] |
| H. S. Osswald | | | Hoch ueber erd und welt und zeit thronst du zu | |
| L. D. O'Steen | | | Once I was lonely, sad and dreary | |
| Oscar E. Osterberg | | | Repeat the glad story of Jesus | |
| Bernie G. Osterhouse | | | He saves, he keeps, he satisfies, this wonderful | |
| W. Osterwald | | | O du mein Trost und suesses Hoffen | |
| M. Ostracis | | | Every cloud that carries water, Every beaming ray | |
| Alfred Ostrom | M | | Al apuntar el alba de aquesta navidad | |
| Henry Ostrom | M | - 1941 | Jesus may come today | |
| Rosaleen O'Sullivan | | | All creation has ears for the word | |
| H. S. Oswald | | | Where the mourner, weeping | |
| Heinrich S. Oswald | M | 1751 -- 1834 | O let him whose sorrow | |
| Adele Otis | | | I'm asking no questions of thee, dear Lord | |
| Otis, Broaders & Co. | U | | | |
| Otis Clapp | | | | |
| Frank Otis | M | | Come to Jesus, ye who wander | |
| J. F. Otis | | | Come to God's altar, O draw near | |
| T. C. O'Toole | | | God thou art, yet dwelt among us | |
| Albert Ott | M | | | |
