Ysolde is a name of Welsh origin and a variant form of Isolde, a name from the medieval name Iseulte.

Isolde means “one who is gazed at” or “the beautiful one”.

Isolde is also derived from either the Old High German words “īs” (“ice”) and “hiltja” (“battle”) or the Brythonic “adsiltia” (“she who is gazed upon”).