I found this information, not sure if it is the same family or not.....good luck.
Cornelius O'Keefe was born in Hudson, Wis., March 21, 1858, a son of Dennis and Catherine (Walsh) O'Keefe, both of County Kerry, Ireland. They came to Philadelphia in 1849, remaining for one year, afterward locating at Belvedere, Broom County, Ill., where the father spent about nine years working on the railroad. Subsequently they came to Hudson, Wis., in the late 50s and bought a lot, upon which the father erected a house. Later they moved to Erin Prairie, Erin Township, Wis., and bought 160 acres, breaking the land and making all improvements. They conducted general farming operations. The mother died in 1879 and the father is still living, being now over eighty-seven years of age, and still hale and hearty. He makes his home with Cornelius on the old homestead. In the family there were five children besides Cornelius. Katie, the oldest of the family died in Erin at the age of nine years. John died in Fargo, N. Dak., at twenty-two years of age. William is now in the far West. Daniel J. is a lawyer in the New York Life building at St. Paul, Minn. His education consisted of course in the common schools, the State Normal school at River Falls, Wis., three years; Commercial College of St. Paul, one year, and the University of Minnesota four and one-half years. Another sister, Mary Ellen, was born in Erin and died at the age of twenty years. Cornelius received a good education in the public schools of Erin, then commenced farming with his father, an occupation which he has since continued to follow. In 1903 he purchased eighty acres of land from his father. At the present time he runs his own farm and also cares for his fathers land. Upon these farms he does a general mixed farming. Cornelius OKeef is not married. Both father and son have held several important offices. The father has served as director of School District No. 3, while Cornelius was deputy game warden during Clevelands administration. The subject of this sketch is a great reader of history, and few men are better informed than he on the course of the worlds great events. He is a progressive farmer and a hard worker. He votes the Democratic ticket and worships at the Catholic church. (taken from "History of the St. Croix Valley", published in 1909)