MorganMcdermott on Family Tree Circles

Thomas Francis McDermott born in Connaught Province, Ireland 1830's, immigrated about 1948-1850 to U.S. Married Margaret Morgan McDermott (also of Ireland) married Thomas in Pittsburgh Pennsylvania in 1850(?). Travelled to Wausau Wisconsin in the Wolf Creek area, Thomas worked for the railroad. Eventually the family ended on Rhinelander Wisconsin where he built the Arlington Hotel and was a founding father of Rhinelander. Thomas Frances McDermott Jr. was my Great-grandfather and he married and moved his family to the Iron Range of Minnesota. I'm looking for family members of Thomas Jr.'s siblings and any information that will point me in the right direction of the area of Ireland they were from.