Roberts, Gary Boyd, The Royal Descents of 600 Immigrants to the American Colonies or the United States: who were themselves notable or left descendants notable in American history, with a 2008 Addendum, Coda, and Final Additions. Baltimore, MD: Gen Pub Co, 2008. NYPL APK 08-4216. Information from this source tagged as [Ref: Roberts RD600 p[0-9]*].
Sources for birth and parent Information
parents:
[Ref: Roberts RD600 p86]
Sources with Information about marriage to Karl Leopold Baron Von L'Esperance And Sandersleben
child:
[Ref: Roberts RD600 p86]
Research Notes:
Countess von Sponeck [Ref: Roberts RD600 p86]