Fair hill or pool by the hill
Brinlyn is a modern American invented name. It likely combines the Welsh element 'Bryn', meaning hill, with the popular English suffix 'lyn', which can refer to a lake or pool. It follows the trend of blending traditional sounds to create a fresh, contemporary identity.
Less common today
Brinlyn isn't in the latest US Top 1000. It last peaked at #9,076 in 2018.
US births per 5-year period, 1990βpresent (SSA data).