My husband's ggg-grandmother was Mary Gallagher (b. 15 Jun 1800 in Leamagowra, Ardara Parish, County Donegal, d. 21 Dec 1886). She married James Malloy (b. 2 Feb 1803 in Leamagowra, Ardara Parish, County Donegal, d. 15 Dec 1884). They emigrated to America in the 1850s (I think) with 9 of their 10 children: Patrick, Nancy Ann, Francis Patrick, Bridget Anna, James, Daniel, Cornelius, John and Susan; Mary (b. About 1825, d. About 1828 in Ireland).
I am trying to confirm who the parents are of this Mary Gallagher and her 3 siblings: Rosana (b. 1805), Charles G (b. 1806), and William (b. 1807). Some researchers show their mother as Grace ODonnell (b. About 1760, d. 1830) and their father as (unknown) Gallagher (b. About 1756, d. 1830).
If anyone can shed more proven light on this line, I would really appreciate it.