Representative of the 64-year-old musician confirmed the news, reported Us maagazine.
The couple named their baby girl, Nia, meaning 'one of the seven principles of (the African American annual festival) Kwanzaa.
Wonder confirmed about Bracy's pregnancy during an appearance on TV talk show 'The View' last month.
Wonder's seven other children were born to several other women.
The 'Isn't She Lovely' hitmaker was previously married to Syreeta Wright from 1970 to 1971 and Karen 'Kai' Millard Morris from 2001 until 2012.