Bay lake or combination of Bay and Lynn
Baelyn is a modern American coinage, likely created by blending the nature-inspired name Bay with the popular suffix -lyn. It may also be interpreted as a variation of the surname Baylin or the name Belen, though in a US context, it is primarily used as a creative, phonetic invention.
Less common today
Baelyn isn't in the latest US Top 1000. It last peaked at #7,341 in 2013.
US births per 5-year period, 1990βpresent (SSA data).