Brooklynn is an elaborated spelling of Brooklyn, the New York borough whose name comes from the Dutch town Breukelen, usually explained as "marshland" or "broken land". American parents hear it as a blend of Brook and Lynn, which is why the double-n spelling feels natural. Brooklynn peaked at number 129 in 2011 as the place-name trend crested and has fallen steadily since, from number 169 in 2015 to number 488 in 2025.