I have the following information on the O'Hearn branch that probably contains your father.
I have a Maurice O'Hearn, born abt. 1841, Co. Waterford, died abt. 1889, Ellsworth, MN. His wife was Anna Larkin, b., 1838, Headford, Co. Galway.They had six children, Jack, abt 1862; Anna, abt 1864; Edward, abt. 1866; Joseph, abt. 1866; Maurice, Abt, 1868, and Elizabeth Jane, 1870 (my grandmother).
I show that Jack married Elizabeth (I don't have her maiden name) and that they had 4 children - Mary, Rapheal (Ray), Morris (Maurice), and Gertrude.I don't have any information on the children and would appreciate any you could supply.
The following is from the Ellsworth, MN, Centennial book:
Maher - Butler - Finnerty - O’Hearn - Guinan - Egan - Basing - HolleranFamilies
Many of the early day families were related through marriage.This was particularly true of the first Irish families who came to Grand Prairie.An abbreviated account of these families is given here.
John O’Hearn and Mary Wheylan, both of County Waterford, were married about 1835.They were the parents of two sons, Maurice and Richard, both of whom came to Grand Prairie township before it was organized.A daughter, Katherine, married Thomas Burke.Maurice O’Hearn was one of the first elected County Commissioners of Nobles County.He married Anna Larkin, born 1838 in County Galway, a daughter of John and Anna (Madden) Larkin.Their children were: Agnes; Mary, married Tom J. Fagan; Anna, married Michael Guinan; Elizabeth, married Edward Maher; Maurice; Edward, married Agnes Campbell; John, married Gertrude Feeney; Joseph, married Elizabeth Ryan. Richard O’Hearn married Elizabeth Larkin.She and Anna Larkin were sisters to Father John Larkin, for whom Larkin township in Nobles county is named. The children of Richard and Elizabeth O’Hearn were: William J., married Anna Gilbertson; John, married Molly; Catherine, 1872-1927; Elizabeth (Lillian) married Martin Finnerty; Anna Clare, 1880-1908; Mary, married Mr. Sheehan; Maggie, died at age three; Richard, Jr., married Alice Milligan.
William J. O’Hearn and Anna Gilbertson, daughter of Paul and Anna (Stevenson) Gilbertson, had the following children: Myrtle, 1894 - 1895; Arthur; William J.; and Marietta, married Laird Holmes.
And this was at the end of the article about Dick Butler, aka "Klondike Dick."
While Dick Butler achieved the most spectacular success in the Klondike gold fields,other Ellsworth community boys came home with enough gold to buy farms, start in business elsewhere, get married, or in the case of John Butler, pay for his medical education.Listed below are some of the young gold seekers:
Rudolf Lenz, bought a farm in section 9 of Grand Prairie.
Gerhard Lenz, brother of Rudolph, bought land near Adrian.
Jack O’Hearn, bought 320 acres in Larkin township.
Norwood Corey, son of Engineer Parkhurst Corey.He bought the Jones farm just north of town at $30.00 an acre.This is the present Pommer Farm.
Charley Loveland, bought the C. A. Barnes Farms complete with equipment and livestock for $4,500.
John Butler, graduated from the University of Minnesota Medical School.
James and Will Butler bought land in Saskatchewan, Canada, and later returned to Alaska.
Tom Maher returned to Alaska to live.
I'll send the entire article in a seperate email.