Noble lake or hill lake
A modern American invention combining the Irish element Bree, meaning noble or high, with the popular suffix Lynn, meaning lake. It may also be interpreted as a variation of the name Brianna or a combination of the name Bree with Lynn.
Less common today
Breelynn isn't in the latest US Top 1000. It last peaked at #3,514 in 2016.
US births per 5-year period, 1990βpresent (SSA data).