| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 141 | Ginessa | Celtic | White as foam. | F | |
| 142 | Gitta | Celtic | Strong. | F | |
| 143 | Grania | Celtic | Love. | F | |
| 144 | Guenevere | Celtic | White lady. | F | |
| 145 | Guennola | Celtic | White. | F | |
| 146 | Guinevere | Celtic | White lady. | F | |
| 147 | Gwendolen | Celtic | Of the white brow. | F | |
| 148 | Gwendolin | Celtic | Of the white brow. | F | |
| 149 | Gweneth | Celtic | Blessed. | F | |
| 150 | Gwenith | Celtic | Blessed. | F | |
| 151 | Gwenn | Celtic | Of the white brow. | F | |
| 152 | Gwenneth | Celtic | Blessed. | F | |
| 153 | Gwenyver | Celtic | White lady. | F | |
| 154 | Gwyndolin | Celtic | Of the white brow. | F | |
| 155 | Gwynith | Celtic | Blessed. | F | |
| 156 | Gwynn | Celtic | Of the white brow. | F | |
| 157 | Idelisa | Celtic | Bountiful. | F | |
| 158 | Idelle | Celtic | Bountiful. | F | |
| 159 | Iona | Celtic | From the king's island. | F | |
| 160 | Ione | Celtic | From the king's island. | F | |