Flowing stream or lake
A modern American invention combining the name Rhea, likely from the Greek 'rheo' meaning to flow, with the popular suffix -lynn, meaning lake. It suggests a sense of movement and natural beauty.
Less common today
Rhealynn isn't in the latest US Top 1000. It last peaked at #7,999 in 2013.
US births per 5-year period, 1990βpresent (SSA data).