| Welsh baby names begining from H |
| Hayden |
 | Variant of Haydn: Fire. Derived from the Celtic name Aidan. |
| Haydn |
| Fire. Derived from the Celtic name Aidan. |
| Haydon |
| Variant of Haydn: Fire. Derived from the Celtic name Aidan. |
| Heilyn |
| Legendary son of Gwynn. |
| Hen Beddestyr |
| Legendary son of Erim. |
| Hen Was |
| Old servant. |
| Hen Wyneb |
| Old face. |
| Heulwen |
 | Sunshine. |
| Howel |
| Variant of Hywel: Eminent. Attentive. |
| Howell |
| Variant of Hywel: Eminent. Attentive. |
| Hu |
| Welsh form of Hugh 'intelligent'. |
| Huabwy |
| Legendary son of Gwryon. |
| Huarwar |
| Legendary son of Avlawn. |
| Hueil |
| Legendary son of Caw. |
| Huey |
| Variant of the Latin Hugh. A thinker. Intelligent. |
| Hugh |
| Variant of the Latin Hugh. A thinker. Intelligent. |
| Hughie |
| Variant of the Latin Hugh. A thinker. Intelligent. |
| Huw |
| Welsh form of Hugh. A thinker. Intelligent. |
| Hydd |
| Deer. |
| Hywel |
| Eminent. |
| |
