Likely an English surname-style variant related to Sheryl or Sherilyn, with a modern blended sound rather than a single ancient root.
Sherlin is a modern feminine name that evolved in the late twentieth century, most likely as a phonetic elaboration of Sheryl — itself a variant of Cheryl, which emerged in the 1920s and 1930s as an Anglophone invention blending the sounds of popular names like Cherry, Carol, and Beryl. The Cher- prefix had acquired a romantic, French-inflected quality from the word chérie ("darling"), and names built on that sound — Cheryl, Sherry, Sherri — spread widely through mid-century American naming culture. The -lin suffix that transforms Sheryl into Sherlin belongs to a productive pattern in English feminine names: Carolyn, Marilyn, Jacquelyn, Madelyn.
It softens and extends, giving the name a flowing, three-syllable shape that the shorter Sheryl lacks. Sherlin appears with notable frequency in Latin American communities, particularly in Colombia, Venezuela, and Central America, where American name fashions traveled through mid-century media and were then adapted, extended, and made distinctly local. In these communities Sherlin stands fully on its own, no longer felt as a derivative but as a name with its own identity.
Sherlin carries no ancient etymology, no saint's day, no famous historical bearer — and that is, in a sense, its freedom. It is a purely modern construction, shaped by sound and feeling rather than history, and it reflects the democratic creativity of ordinary families who build names the way poets build metaphors: by ear, by instinct, and by love.