Wise protector or beam of light combined with lake
A modern American invention, Raylyn likely combines the Germanic element 'Ray' (meaning wise protector or counsel) with the popular Welsh-derived suffix 'lyn' (meaning lake). It can also be interpreted as a combination of the English word 'ray' (as in a beam of light) and the name Lynn.
Less common today
Raylyn isn't in the latest US Top 1000. It last peaked at #2,782 in 2012.
US births per 5-year period, 1990βpresent (SSA data).