Dafydd ap Gwilym as a Baby Name. Meaning and Origin of Dafydd ap Gwilym

What is the meaning of the name Dafydd ap Gwilym ?

The baby name Dafydd ap Gwilym is a Male name , 2125 syllables long and is pronounced /ˈdaːvɨð ap ˈɡwɪləm/ — DAH-vith ap GWI-lim.

Dafydd ap Gwilym is Welsh in Origin.

Dafydd ap Gwilym is a classic Welsh patronymic that literally means “Dafydd, son of Gwilym.” Dafydd is the Welsh form of David, from Hebrew Dawid, usually interpreted as “beloved.” Gwilym is the Welsh equivalent of William, from Proto-Germanic roots wil “will, desire” + helm “helmet, protection.” The linking particle ap (variant ab before a vowel) is the standard Middle Welsh marker for “son of.” Together the name evokes both affection and steadfast protection.

In use, this construction reflects medieval Welsh naming practice rather than a single given name. Its best-known bearer is the 14th‑century poet Dafydd ap Gwilym, a towering figure in Welsh literature. Modern variants include Dafydd, David, Dewi, Dai, and Taffy for the first element; Gwilym, William, and Gwilim for the second. The patronymic later generated hereditary surnames such as Williams and Gwilliam when Welsh families adopted fixed surnames.

⚙ Dafydd ap Gwilym is absent from every birth registry and name dataset we follow. That's typically a sign of a rare name, a regional or traditional one, or a modern coinage. Either way, it remains a genuinely rare choice.