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It may be possible to confirm family relationships with Robertina by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Robertina:
Mother: Eliza Peterson
Roberta Dinzey married on June 15th, 1850 a Swedish nobleman, Carl John Ridderhjerta. They had a daughter Augusta Gabrielle Robertina Ridderhjerta Dinzey. Augusta Gabrielle married Axel Victor Emanuel Dolman, also Swedish nobleman, on February 24th, 1873. Axel died in 1926 and Augusta passed away on May 17,1922. They had no children.