Variant of Adeline/Adelaide, from Germanic 'adal' (noble) and 'heid' (kind/type).
Adelayne is a decorative variant of Adeline or Adelaide, drawing on Germanic roots in adal meaning noble and heid meaning kind or type. That etymology places it in the long European tradition of names built from virtues and rank, where nobility is not only social but also moral.
The -layne spelling gives the familiar root a softened, more contemporary silhouette, while still keeping the old noble structure visible beneath it. As a modern spelling, Adelayne feels like a bridge between classic and invented. It has the polish of an established name, but the graphic extra syllables make it seem more lyrical and individualized.
That combination has broad appeal in naming culture today: parents often want something that sounds traditional enough to age well but distinct enough to stand apart. Adelayne answers that desire with grace, carrying an elegant, slightly romantic tone.