Light or bright one
Alynah is a modern American coinage, likely a creative spelling variant of Alaina or Elena. It is often associated with the Greek name Helene, meaning torch or light, or the Arabic name Alayna, meaning greatness.
Less common today
Alynah isn't in the latest US Top 1000. It last peaked at #5,370 in 2007.
US births per 5-year period, 1990βpresent (SSA data).