Wyllow is a distinctive unisex name of Welsh origin, derived from "gwyl", meaning festival or celebration, often associated with the Celtic festival Samhain, but not directly connected to it. Its popularity has grown recently among parents seeking unique and meaningful names, with many believing it signifies celebrating life's changes. Though its history is not well-documented, Wyllow has been used as a given name in Wales for centuries and gained broader recognition in the late 20th century.