Variant of Gwendolyn, from Welsh 'gwyn' (white, fair) and 'dolen' (ring, bow).
Gwyndolyn is a variant spelling of Gwendolyn, a name with deep roots in Welsh mythology and medieval Arthurian legend. The Welsh elements are gwen — meaning "white," "fair," or "blessed" — and dolen — meaning "ring" or "bow" — giving the name a combined sense of radiant circling or blessed enclosure. In Welsh tradition, Gwendolen appears as the daughter of Corineus in Geoffrey of Monmouth's twelfth-century "Historia Regum Britanniae," one of the earliest pseudo-historical accounts of Britain, where she figures as a queen of legendary Britain.
Later Arthurian tradition incorporated Gwendolyn as a figure associated with magical knowledge and the otherworldly feminine. The name gained significant literary traction through Oscar Wilde's "The Importance of Being Earnest" (1895), in which Gwendolen Fairfax is one of the play's two female leads — witty, self-possessed, and entirely certain of her own significance. Wilde's Gwendolen gave the name a comedic elegance, an air of knowing sophistication that has flavored its literary associations ever since.
The American poet Gwendolyn Brooks (1917–2000), the first African American to win the Pulitzer Prize for Poetry, gave the name a profoundly different dimension — anchoring it in the lived experience of Black Chicago and in the tradition of politically engaged American verse. The Gwyndolyn spelling restores a more Welsh-looking orthography, with the initial Gwyn- bringing the "white" or "blessed" element into sharper visual focus. It is a name that carries Celtic mist and literary sharpness in equal measure — ancient in origin, fully alive in practice.