I know this is quite the long shot but the early life of this orphan really touches me. Bridget was my great-great grandmother on my father's side. Any clues would be greatly appreciated.
From 1894 official history of Dubuque, Iowa:
"Bridget Gearon was of French descent. Her father served as a Colonel in the French army. Mrs. McNamara was born in Ireland in 1811, and when fifteen years of age was orphaned and emigrated with friends to America. She made her home for a time in Troy, N. Y., after which she came to Dubuque, and in 1839 was married to John McNamara. She departed this life in 1861 at the age of fifty years."