Addison is an English surname that means "son of Adam" and only became a girls' first name in the United States in the 1990s. The character Addison Montgomery in the TV series Grey's Anatomy gave it a big push in the mid-2000s. Addison leaped from number 322 in 2000 to number 11 in 2007, has been in the top 100 since 2006 and has eased down to number 84 in 2025.