Likely a variant of Kevin, from Irish Caoimhin meaning 'gentle' or 'handsome.'
Cavin is a name that straddles Celtic roots and modern American sensibility. It is most naturally understood as a variant of the Irish name Kevin, anglicized from the Old Irish Caoimhín (pronounced roughly "kwee-veen"), itself derived from caomh meaning gentle, kind, or beloved, combined with a diminutive suffix. Saint Kevin of Glendalough — Coemgen in Old Irish — was a sixth-century hermit monk whose austere holiness and closeness to nature made him one of the most beloved saints of early Christian Ireland.
According to legend, he stood so still in prayer that a blackbird nested in his outstretched hand. The name Kevin spread from Ireland throughout the English-speaking world, becoming enormously popular in the United States and Britain during the mid-twentieth century. Cavin pulls away from that peak popularity, offering a quieter, more individualized path to the same warm Celtic roots.
The spelling also carries faint echoes of Gavin — from the Welsh Gawain, the Arthurian knight — giving it a slightly broader literary resonance. Cavin occupies an interesting space in contemporary naming: rare enough to feel distinctive, familiar enough not to require explanation. Its soft consonants and two-syllable rhythm give it an easy, pleasant sound. Parents drawn to Celtic heritage names or simply to the sound of names like Kevin and Calvin sometimes land on Cavin as a middle path — carrying ancient meanings of gentleness and nobility while reading as quietly modern.