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| Isaac Ashmead | M | | | |
| Isaac Collins | M | | | |
| Isaac H. Cady | M | | | |
| H. Isaac, c. 1450-1517 | M | 1450 -- 1517 | Praise God, this hour of sorrow | O WELT, ICH MUSS DICH LASSEN |
| Isaac Knapp | M | | | |
| L. Isaac | | | I am so glad our Father is heaven | |
| A. S. Isaacs | | | A noble life, a simple faith An open heart and | |
| Lewis M. Isaacs | U | | Praise ye the Lord! for it is good | [Praise ye the Lord! for it is good] |
| P. B. Isaacs | | | Mother, I have heard sweet music | |
| Roy Isaacs | M | | Some day when life on earth | |
| Samuel L. Isaacs | M | | Christ the loving Savior now is leading me | |
| Margery Isabel | | | Through the sunny days of gladness | |
| Juan M. Isáis | M | | I've come to tell (Te Vengo a decir) | TE VENGO |
| John Richards (Isalaw), 1843-1908 | M | 1843 -- 1901 | Round the Lord in glory seated | SANCTUS (Isalaw) |
| E. T. Isbell | | | Here we travel through valleys of sorrow | |
| I. I. Isbell | | | Jesus is my faithful Guide | |
| Julia Isbrücker | U | 1887 -- 1971 | | |
| David Clark Isele | M | | Strong is God's love for us | [GOD IS FOR US] |
| Walter E. Isenhour | M | | I've a mansion over yonder in the | |
| Sulamith Ish-kishor | F | 1896 -- 1977 | Sometimes I wake before the dawn | [Sometimes I wake before the dawn] |
| Naoi Ishida | U | 1935 - | Now, let us sing a new song to the Lord | KAMITAKATA |
| Yasurō Ishimaru | U | 1907 -- 1957 | Climb on, climb on, young friend | ASCENDIMUS |
| Ian Smale | M | 1949 - | [Father God, I Wonder] | |
| Isles of Shoals Association | U | | | |
| Islwym | | | Far above earth's cloudy regions | |
| J. N. Ison | F | | There is cleansing at the fountain | |
| Raymond Israel | M | | Hahmohtsee lehḥem min hawhawrets | [Hahmohtsee lehḥem min hawhawrets] |
