Inherited from the Celtic lexicon, the name Arth originates from the Welsh noun arth (“bear”), thereby embedding semantic ties to physical strength and stoic endurance. Functioning in some instances as an abridged variant of Arthur, it preserves the ancestral etymon while offering a succinct, monosyllabic form. Contemporary Anglo-American records attest to its exceptional rarity—just nineteen male births in the United States bore the name in 2024—underscoring its appeal as a distinctive, technically refined choice. Phonetically rendered /ɑrθ/, Arth combines an open back vowel nucleus with a voiceless dental fricative coda, a configuration that aligns with modern naming preferences for crisp articulation and minimalist structure.