Sorry to pick up on this thread so late. In addition to what my friend
Tom Kilker has reported, I have the following information on your great grandparents:
Anthony Kilker, from County Mayo, appears to have immigrated to the US in either 1874 or 1876, depending on which US Census report you accept. Ellen (also Helen) Burrett Kilker, from County Sligo, immigrated to the US in either 1876 or 1885, again depending on which US Census report you accept.
I have more information on your paternal Kilker line.
Was you mother's given name 'Ann'? Can you provide your father's names?