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In page Alvera Frederic:

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When Azemar and Camille married, they lived at 2921 St. Ann St., where Alvera was born. Under the rules of the day in the south (the one-drop rule), Alvera, their daughter and also a descendant of French-Creoles, would be considered black.[1] But, in the 1930 census, her father Azemar Frederic was classified as W—or white.[citation needed]