Creative modern variant of Raelyn, meaning 'beam of light'
Reighlyn is a contemporary American invention, likely created by blending the phonetic elements of names like Riley or Reagan with the popular 'lyn' suffix. While it lacks a singular ancient etymology, it is often associated with the meanings of its component parts, such as 'ray' (beam of light) and 'lyn' (lake).
US births per 5-year period, 1990–present (SSA data).