Campbell Cambell Campell

SEARCHING FOR PARENT'S OF ROBERT CAMPBELL, born 1813, Ireland, farmer. Married about 1835-38, Ireland?
1st. son, Robert jr.,born 1838, Ireland.
2nd. son, James A. CAMPBELL, born 1841-42, Atlantic Ocean.
Robert and Ann CAMPBELL had additional children born at Racine County, Wisconsin, USA:
Jennie CAMPBELL born 1846;
Samuel CAMPBELL born 1848;
Eliza CAMPBELL born 1853;
John CAMPBELL born 1856.
Any information in regard to this family would be most welcomed.