| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 861 | Ilsa | German | Abbreviation of Elizabeth. | F | |
| 862 | Ilse | German | Oath of God. Noble. A German diminutive of the name Elizabeth. | F | |
| 863 | Ilyse | German | Noble. | F | |
| 864 | Immanuel | German | Variant of Emanuel 'With us is God.'. | M | |
| 865 | Ingall | German | Angel. | M | |
| 866 | Ingalls | German | Angel. | M | |
| 867 | Ingel | German | Angel. | M | |
| 868 | Ingelbert | German | Bright angel. | M | |
| 869 | Inglebert | German | Variant of Engelbert: Bright as an angel. | M | |
| 870 | Ingram | German | Ing's raven (Ing was the Norse god of peace and fertility). Used commonly as both a first name and as a surname during the Middle Ages. | M | |
| 871 | Irma | German | Universal, from the Old German 'irmin'. War goddess. | F | |
| 872 | Irmgard | German | War goddess. | F | |
| 873 | Irmigard | German | War goddess. | F | |
| 874 | Irmina | German | War goddess. | F | |
| 875 | Irmine | German | War goddess. | F | |
| 876 | Irmuska | German | War goddess. | F | |
| 877 | Isa | German | Strong willed. | F | |
| 878 | Isana | German | Strong willed. | F | |
| 879 | Isane | German | Strong willed. | F | |
| 880 | Isold | German | Rule of ice. | F | |