Modern invented name, possibly meaning lake or hill
Bralyn is a contemporary American coinage. It likely combines the popular 'Bra-' prefix with the suffix '-lyn', or it may be a creative variation of the Welsh name Braelyn, which is often associated with 'hill' or 'lake'.
Less common today
Bralyn isn't in the latest US Top 1000. It last peaked at #2,501 in 2011.
US births per 5-year period, 1990βpresent (SSA data).