My Emperor family is from Brosna, County Kerry, Ireland.
The four sons of John and Ellen Emperor immigrated to the US.
Thomas Emperor (1815 - 1896) married Mary Hogan
James Emperor (1824 - 1910) married Catherine Quinlan
Lawrence Emperor (1828 - 1865) married Mary Shehea
Cornelius Emperor (1831 - 1910) married Catherine
I haven't researched them in County Kerry but have found quite a lot about these four and there descendants.