Adalynn is a modern spelling of Adalyn, a name explained either as a variant of Adeline or as a blend of Ada with the popular ending -lynn. Either way, its root is usually given as the Germanic element adal, meaning noble.
It is pronounced uh-DUH-lin (/əˈdʌlɪn/), with the stress on the second syllable. Because the spelling is a recent one, Adalynn has no long-standing literary or historical associations and no widely known namesakes.
In the U.S., Adalynn was rare as recently as 2006, when only 84 babies were given the name. It then climbed steadily, peaking at 108th in 2018. It has slipped since, and in 2025 it ranked 184th, with 1,683 babies.