In 2018, 57 is the most common age for an American (U.S.) Dannie* who is registered male with the Social Security Administration. It is the 2, 473rd most common male first name for living U.S. citizens. In 2018, 63 is the most common age for an American (U.S.) Dannie* who is registered female with the Social Security Administration. It is the 7, 093rd most common female first name for living U.S. citizens. *as a first name, not a nickname.
― Anonymous User 10/19/2018
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Also a diminutive of Danielle.
― Anonymous User 1/18/2018
1
While acceptable for girls, Dannie is too feminine of a spelling for boys.
https://www.behindthename.com/names/history.php?name=dannie
According to the USA Social Security Administrtration, 26 girls and 19 boys were recorded with the name Dannie in 2020.
https://www.names.org/n/dannie/about
https://www.nancy.cc/baby-name/dannie/