M.V. Koger. Index to the names of 30,000 immigrants--German, Swiss, Dutch and French into Pennsylvania 1727 to 1776. Supplementing the I Daniel Rupp, Ship Load Volume. Page 8.
Rupp, Israel Daniel. A Collection of Upwards of Thirty Thousand Names of German, Swiss, Dutch, French and Other Immigrants in Pennsylvania from 1727 to 1776, with a Statement of the Names of Ships, Whence They Sailed, and the Date of Their Arrival at Philadelphia, Chronologically Arranged, Together with the Necessary Historical and Other Notes, also, an Appendix Containing Lists of More Than One Thousand German and French Names in New York prior to 1712. Leipzig [Germany]: Page 68.
It may be possible to confirm family relationships with Maria Dorothea 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 DNA with Maria Dorothea: