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| H. W. Orinside | | | Lord Jesus, what grace do I see | |
| P. R. Orjala | | | Jesus, the Shepherd, is seeking the lamb | |
| D. Orlay | | | Doufam v Boha v svem nestesti | |
| Ilo Orleans | U | | I pause a moment while I play | |
| G. W. Orlia | | | The Master is calling to service | |
| G. Ormond | | | In the leafy branches | |
| John Ormrod | M | | | |
| O. B. Ormsby | | | From the woods and from the hills | |
| A. S. Ormsey | | | I am standing outside thy door tonight | |
| M. G. Ormund | | | Dark though the shadows be | |
| H. W. Orner | | | Each day as the sun breaks forth to my view | |
| Rhetta O'Rourke | | | Lord, let me lose myself in thee | |
| Rhetta C. O'Rourke | | | There is no death to him who sees beyond | |
| Kathleen Orozco | F | | Bread for the journey (Pan para el viaje) | [Bread for the journey] |
| Charles E. Orr | M | 1861 - | In thy clear, transparent glow | [In thy clear, transparent glow] |
| J. Edwin Orr | | | Search me, O God [Lord], and know my heart today | |
| J. Edwin Orr, 1912- | M | 1912 -- 1987 | Search me, O God, and know my heart today | MAORI |
| J. J. Orr | | | I have drank of the water of life | |
| J. L. Orr | | | | |
| James L. Orr | M | | I am waiting, I am waiting | |
| Nina J. Orr | | | How sweet to be alone | |
| P. P. Orr | | | A beautiful mansion in heaven above | |
| R. P. Orr | | | | |
| R. Porter Orr | | | From the Bible you may know how to be | |
| Meta Orred | U | | In the gloaming O my darling! | |
| J. M. Orrock | | | A little while, a little | |
| Albert Orsborn | M | | Army flag, thy threefold glory | |
| Albert Orsborn | M | 1886 -- 1967 | Let the beauty of Jesus be seen in me | [Let the beauty of Jesus be seen in me] |
| Ortiz Alfredo Ortiz | | | Senor, te rindo gratitud por mi tranquilo reposar | |
| E. Ortlepp | | | Gott, dem des Seraphs Harfe klingt | |
| W. T. Ortlif | | | Sad and lonely weak and weary | |
| Walter J. Ortlip | M | | Through the world, with stately tread | |
| William J. Ortlip | M | | I long to be perfect | |
| Anne Ortlund | F | 1923 - | The vision of a dying world | |
| Raymond C. Ortlund | M | | Worship is the highest | |
| F. F. Ortman | | | In der dunklen Truebalsstunde | |
| J. R. Orton | | | O, guide thy bark with care, my child | |
| E. E. Orvis | | | O praise the Lord, 'tis good to sing | |
| Orwell | | | Eternal Word, God's true and only Son | |
| Aaron W. Orwig | M | | Almighty God, do thou behold | |
| P. S. Orwig | | | Let us make this sacred temple | |
| William W. Orwig | M | | Ach, wie ist der Mensch verdorben | |
| A. Ory | U | | Chantez pour Dieu un chant nouveau | [Chantez pour Dieu un chant nouveau] |
| C. R. Osbeck | | | With God and his friendship | |
| Osborn | | | Say, but the word, thy servant shall be healed | |
| Albert Osborn | M | | Let the beauty of Jesus be seen in me | [Let the beauty of Jesus] (Ackley) |
| C. J. Osborn | F | | Each gentle word is a bird of love | |
| C. Edwin Osborn | M | 1897 -- 1965 | "Where two or three are gathered in my name," declared Jesus | |
| J. Osborn | | | If you are unhappy | |
| Kate Osborn | F | | Ever blessed Jesus, listen unto me | |
