Recommendations avoid excessive rhyming and favor compatible style, origin, era, and rhythm.
Borrowed from English Arthur, from the name of the legendary king, from Middle English Arthure, from Medieval Latin Arthurus, probably from Welsh arth, from Proto-Celtic *artos.
From Welsh, derivation uncertain. Possibly "prominent".
From Welsh Caradog. Doublet of Caradoc, Caratacus, Cedric, Craddock, Cradock, McCarthy, and McCarty.
Invented by Walter Scott for Ivanhoe, possibly misread for Cerdic, name of a Saxon king, anglicized from Welsh caredig (“beloved”), in which case a doublet of Caradoc, Caradog,…
From Middle Welsh eneit (“spirit, life; purity”), from Proto-Celtic *anatyom, from Proto-Indo-European *h₂enh₁- (“to breathe, blow”). Cognate with Gaulish anatia (“souls (?)”)…
From Welsh Hywel. Doublet of Huell and Powell.
Borrowed from English Arthur, from the name of the legendary king, from Middle English Arthure, from Medieval Latin Arthurus, probably from Welsh arth, from Proto-Celtic *artos.
From Welsh, derivation uncertain. Possibly "prominent".
From Welsh Caradog. Doublet of Caradoc, Caratacus, Cedric, Craddock, Cradock, McCarthy, and McCarty.
From Middle Welsh eneit (“spirit, life; purity”), from Proto-Celtic *anatyom, from Proto-Indo-European *h₂enh₁- (“to breathe, blow”). Cognate with Gaulish anatia (“souls (?)”)…
In modern use a spelling variant of Lynette, though it is also identical with a rare French name, diminutive of Line, from Caroline, Pauline and other female names ending in -line.
From Welsh Lowri.
Sibling matches balance shared style and origin with enough sound distinction, so recommendations do not simply rhyme with Gwynn.