Before there was Aspen, Denver was the Colorado city name of choice, and it reentered the US Top 1000 in 2015 after a 14 year absence as a stylish two-syllable boys’ name with its trendy -er ending. Its decade of greatest use was the 1920s, when it reached as high as Number 422.

Yet another creative character name from Toni Morrison, Denver was a daughter of Sethe's in the novel Beloved. Today Denver is most familiar as the name of the largest city in Colorado, used almost equally for girls and boys.