From her marriage record:
mother: Martha Lucinda Joanne Caroline Lehmann
father: Hermann Richard Lehmann
see the image of the original at "Brasil, Rio de Janeiro, Registro Civil, 1804-2013", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:X91Q-QK7C : Tue Feb 25 21:15:02 UTC 2025), Entry for Ricardo Jacques Dresdner and Rosa Maria Augusta Dresdner, 18 de abril de 1936.
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Sincerely,
Katherine Dresdner
