Modern invented name, possibly meaning hill or lake.
Brailynn is a contemporary American invention, likely created by blending the 'Bray' sound from names like Braden or Brielle with the popular 'lynn' suffix. While it lacks a singular ancient root, it is often associated with the Welsh word 'bre' meaning hill or the Germanic 'lin' referring to a lake.
Less common today
Brailynn isn't in the latest US Top 1000. It last peaked at #2,348 in 2014.
US births per 5-year period, 1990βpresent (SSA data).