I found this family in 1850 census of Hampden County Mass. and Elizabeth, the daughter of John Hoare might be the one who married Eugene Fitzgerald, but she died 1900.
After some more search I think her sister Catherine is connected to my family. Catherine married Michael O'Connor and they later moved to Holyoke, Mass. In the period between 1850 and 1860, the O'Connors were in Virginia and then came back to Mass, when Michael O'Connor joined the Union Army.
Let's exchange notes.