My husband is a descendant of Charles Droll and Mary M. Birrer.
The only other infoI have is that Charles' parents were William Droll b. 1810 Westphalia, Prussia and Elizabeth Brockman b. about 1816. William Droll died about 1865.
Elizabeth Brockman's parents were Johannes Antonius Brockman b. Oct. 4, 1781 in Alhausen, Hoxter, d. Nov. 28, 1884 and Maria Elizabeth Berg b. June 10, 1784 in Alhausen and d. April 23, 1856 in Hoxler.
After Elizabeth's death William married Dena Brockman, probably the sister of Elizabeth.