Modern invented name, possibly meaning noble lake or pool
Brylinn is a contemporary American coinage, likely created by combining the popular prefix 'Bry-' (often derived from Brian or Brianna) with the suffix '-linn' or 'Lynn'. While its roots are speculative, it is often associated with the Celtic 'bre' meaning hill or noble and the Welsh 'llyn' meaning lake.
Less common today
Brylinn isn't in the latest US Top 1000. It last peaked at #10,398 in 2012.
US births per 5-year period, 1990βpresent (SSA data).