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Barbara Dennerlein was born on 1964-09-25.
Fritz Dennerlein was born in 1936.
Fritz Dennerlein died in 1992.
Barbara is the mother of your daughter's mother. That means that you are married to Barbara's daughter..which makes you her husband. Therefore you are the son-in-law of Barbara.
You could also be Barbara's daughter. Barbara is the grandmother.
Barbara Mandrell