Andi is a short form of Andrea, the feminine form of Andrew, which goes back to the Greek andreios and means "brave" or "manly". Like Charlie, Stevie and Frankie it is part of the trend toward boyish nicknames used as full names for girls. In the United States Andi entered the top 1000 in 2015 at number 917 and has climbed almost every year since, reaching 632 in 2025, its best rank so far.