Annwfn as a Baby Name. Meaning and Origin of Annwfn

What is the meaning of the name Annwfn ?

The baby name Annwfn is a Unisex name , 2 syllables long and is pronounced AN-oon (IPA: /ˈanʊn/ or /ˈænʊn/).

Annwfn is Welsh in Origin.

Annwfn is the Middle Welsh spelling of Annwn, name of the Welsh Otherworld. The word descends from Brittonic/Proto-Celtic *ande-dubnos, combining an intensifier with dubnos “deep, world,” hence “very deep (world), underworld.” It appears throughout medieval literature, notably the Mabinogi’s Pwyll Pendefig Dyfed, where Arawn rules a radiant, hunt-filled realm more paradisal than infernal. In Middle Welsh orthography, f represents the v sound, so the spelling echoes Annwn’s pronunciation.

As a given name, Annwfn is modern and very rare, with no traditional Welsh usage; it surfaces in late 20th–21st-century English-speaking circles for mythic or neo-pagan appeal. Variants and related forms include Annwn (standard Welsh), Annwfyn/Annun (medieval), and the literary Anglicization Annuvin. Modern elaborations Annwyn/Anwyn occur but are often conflated with the unrelated Welsh name Anwen. Meaning for name-bearers is typically glossed as “Otherworld” or “very deep; underworld.”

⚙ Annwfn doesn't appear in any of the birth registries or name datasets we track. It's the kind of name that tends to be rare, regional, or newly made up. Whichever it is, scarcely anyone else carries it.