In 2018, 85 is the most common age for an American (U.S.) Effie* who is registered female with the Social Security Administration. It is the 1, 818th most common female first name for living U.S. citizens. *as a first name, not a nickname.
― Anonymous User 10/5/2018
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As a male name in the US during the 1800s and early 1900s it may have been a nickname for Efraim or Ephraim.