Addilynn is a modern American elaboration of Addie and Adeline, which go back to the Germanic word adal, meaning "noble". The double n spelling belongs to the wave of -lynn names that peaked in the 2010s alongside Adalynn and Brooklynn. Addilynn entered the US top 1000 in 2014, reached number 610 in 2016 and has since fallen back to number 1548 in 2025.