Hi,

There is an extensive family tree Thomas McKiernan Family Tree at Ancestry. Most larger libraries provide free access to Ancestry.

In 1900 the family was living in Peoria, Peoria, IL.
James Mckernan, b. PA, March 1852, machinist.
Ellen, wife, b. IL, June 1854, had given birth to 12 children and eight alive in 1900.
Thomas, b. IL March 1876, single, day laborer.
John, b. IL, April 1881, single, laborer glucases?
Mary, b. ND, Sept. 1883, laundress
Ellen, b. ND, Aug 1885, laundress
Anna, b. MT Nov? 1888
Elizabeth, b. MT Dec 1889
Edward, b. IL, Feb. 1893
Loretta, b. IL, June 1897.

In 1910 most of the family lived in Peoria.
James B. Mckeernan, b. PA, 58, marr 35 yrs, engineer coal mine.
Ellen, wife, b. IL, 56, had given birth to 12 children & eight alive in 1910.
Emma, b. MT, 21, single, stenographer distillery office.
Elizabeth, b. MT, 19, single
Elwood, b. IL, 17
Loretta, b. IL, 13
John Sr., brother, b. NC, 50, single, bartender saloon.

In 1920 James was living with his daughter Anna in Peoria.
Jerry Speean, head, b. IA, 35, commercial trucker
Anna, wife, b. MT, 30, stenographer alcoholic co.
James B. Mckierman, falaw, b. PA, 68, widower.
Elizabeth Mckierman, sislaw, b. MT, 28, private family nurse.

In 1930 the family lived in Peoria.
Clarence J. Sheehan, head, b. IL, 46, salesman farm machinery
Anna, wife, b. MT, 41.
Jerry J., son, b. IL, 7.
James Mckiernan, falaw, b. PA, 78, widower.
Loretto Lamester, sislaw, b. IL, 33, widow.

James B. McKiernan
Born: 1 March 1852, Egypt, North Carolina
Died: 25 Sept 1935, Peoria, Peora, IL
Burial: 28 Sept 1936, St. Mary's Cemetery, Peoria.
Occupation: Coal miner
Residence: Peoria
Father: Thomas McKiernan born Pennsylvania
Mother: Bridget McCofferd born Ireland
Spouse: Ellun
Source: Family History Center Filem #1766170, Illinois Deaths & Stillborn Index 1916-1947.

"Aged Peoria Man, James M'Kiernan Dies After Fall"
"James B. McKiernan, 84, who made his home with a daughter, Mrs. C. J. Sheehan, 340 Callender Ave, died in St. Francis Hospital at 11:15 pm last night. he was removed there thursday with a fractured thigh-bone, sustained when he suffered a fall."

"Mr. McKiernan, a retired hoisting engineer and resident of Peoria for the past 50 years was born March 1, 1852 in Egypt, North Carolina [looks like a mistake]. He had lived in Illinois 70 years and retired in 1914."

"He married Miss Ellen O'Connor in Ottawa, Illinois in 1872. His wife preceded him in death in 1910. To their union was born six [looks like another mistake] children, including Mrs. Daniel Manning, Mrs. C. J. Sheehan, Mrs. Loretta LeMaster, Thomas and John McKiernan, all of Peoria and mrs. LeRoy Philllips, Buchanan, Michigan. Two brothers and one sister, Mrs. Agnes Eddy, Fairbury, Illinois, William of Montana and Frank McKiernan of Rock Island, Illinois also survived as do six grandchildren and many neices and nephews."

"Mr. McKiernan was a member of St. Mark's Catholic Church and services will be their at 9 am Monday morning preceded at 8:30 by rites at the Boland Mortuary. The Rev. Msgr. J. J. Burke of St. Mary's will officiate and interment to follow in St. Mary's Cemetery." Source: Thomas McKiernan Family Tree, The Peoria Star, September 26, 1936" Successful Searching!