| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 661 | Ivette | Spanish | Variant of Yvette. | F | |
| 662 | Izar | Spanish | Star. | F | |
| 663 | Izarra | Spanish | Star. | F | |
| 664 | Izarre | Spanish | Star. | F | |
| 665 | Izazkun | Spanish | Reference to the Virgin Mary. | F | |
| 666 | Jacinta | Spanish | Hyacinth or purple. | F | |
| 667 | Jacinto | Spanish | Hyacinth. | M | |
| 668 | Jacobo | Spanish | Supplanter. | M | |
| 669 | Jade | Spanish | Jewel. | F | |
| 670 | Jago | Spanish | Supplanter. | M | |
| 671 | Jaime | Spanish | Pet form of James used as a woman's name. | F | |
| 672 | Jaime | Spanish | Supplanter. | M | |
| 673 | Jaione | Spanish | Reference to the Nativity. | F | |
| 674 | Jairo | Spanish | Variant of the Hebrew Jairus 'Jehovah enlightens.'. | M | |
| 675 | Jakinda | Spanish | Hyacinth. | F | |
| 676 | Jasone | Spanish | Assumption. | F | |
| 677 | Javier | Spanish | Bright. Variant of Xavier. | M | |
| 678 | Javiera | Spanish | Owns a new house. | F | |
| 679 | Javiero | Spanish | Born in January. | M | |
| 680 | Jax | Spanish | Masculine form of the Greek name Hyacinth 'alas.'. | M | |