Hazelyn is a unique and captivating girls' name of uncertain origin, possibly derived from the hazel tree or a blend of Hazel and Alynn/Aylin. Despite its unclear beginnings, Hazelyn has gained popularity in recent years, notably appearing on U.S. popularity charts starting in 2015. Throughout history, notable figures like Hazeley Pemberton and Hazelyn Warren have carried this name, while it also appears in literature (e.g., "The Selection" series) and music (Tom Walker's "Hazel Eyes").