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Millie was not ranked in 2017 and 2018.
Millie was first given as a name in the U.S. in the 1900s.
The popularity of Millie reached its heights in the 1920s. Its second most popular decade was the 1910s.
Since 1880, approximately 30,528 people in the U.S. have been given this name. 207 were men and 30,321 were women.