| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 241 | Humberto | Spanish | Intelligent; Big; bright. | M | |
| 242 | Iago | Spanish | Supplanter. Spanish form of Jacob. Associated with the wicked Iago in Shakespeare's Othello'. | M | |
| 243 | Ignado | Spanish | Fire. | M | |
| 244 | Ignazio | Spanish | Fire. | M | |
| 245 | Iliana | Spanish | Variant of Elena. | M | |
| 246 | Incendio | Spanish | Fire. | M | |
| 247 | Inigo | Spanish | Fiery. Spanish variant of the Latin name, Ignatius. | M | |
| 248 | Inocencio | Spanish | Innocent. | M | |
| 249 | Inocente | Spanish | Innocent. | M | |
| 250 | Isadoro | Spanish | Strong gift. | M | |
| 251 | Isaias | Spanish | Salvation of Jehovah. | M | |
| 252 | Ishmael | Spanish | God listens. In the bible Ismael was son of Abraham by Sarah's Egyptian slave woman Hagar. | M | |
| 253 | Isidoro | Spanish | Gifted with many ideas. | M | |
| 254 | Isidro | Spanish | Gifted with many ideas. | M | |
| 255 | Ismael | Spanish | God listens. In the bible Ismael was son of Abraham by Sarah's Egyptian slave woman Hagar. | M | |
| 256 | Ivan | Spanish | Archer. | M | |
| 257 | Jacinto | Spanish | Hyacinth. | M | |
| 258 | Jacobo | Spanish | Supplanter. | M | |
| 259 | Jago | Spanish | Supplanter. | M | |
| 260 | Jaime | Spanish | Supplanter. | M | |