Marjorie and I have entertained the theory that William Rosborough was a relative of Margaret McCloskey, reasoning from our grandfather's being named after him and what we knew of his history.  But I finally got smart and did a search on his wife, which led me to this 
ebook republishing a history.(I've corrected obvious problems in the scanning. )
WILLIAM ROSBOROUGH was a represent- 
ative business man of Randolph County, 
and well deserves representation in its 
history. He was born in Ballymena, Ireland, in 1802, 
and when a youth of sixteen crossed the Atlantic 
to America, locating in Cincinnati, Ohio. There 
he entered the employ of a Mr. Mahard, who was 
engaged in the commission business, and with 
whom he continued until 1833. 
In that year Mr. Rosborough married Miss Mary 
Mahard, a sister of his employer. To them were 
born five children. Elizabeth is now residing in 
the old home in Sparta. Robert H., a railroad con- 
tractor and auditor, and also a dealer in coal, 
married Elizabeth McCutcheon, and they have 
five children: William J., a railroad conductor; 
Rachel, Robert H., Jr., .John and Allen. Martha 
R., the third child of the family, is the widow of 
Dr. ?eeper, who was born in Beaver County, Pa., 
in 1832, and there grew to manhood. He pursued 
his literary studies in .lefferson College, and studied 
medicine in the State Universily of Pennsyl- 
vania at Philadelphia. He began practice in Ches- 
ter, Ill., and afterward removed to Coulterville, 
where he followed his profession for twenty - flve 
years. His name is always mentioned in the high- 
est terms of praise by all who knew him. He 
won an enviable position in his profession, and 
was a liberal and public-spirited citizen. Anna 
J., another member of the Rosborough family, is 
the wife of Daniel P. Barker, of Sparta, Secretary 
and Superintendent of the Sparta Natural Gas 
and Oil Company. He served in the Union army
as a member of Company K, One Hundred and 
Forty-second Illinois Infantry, and at the close of 
the war returned to Sparta, where he has since re- 
sided. Mr. and Mrs. Barker have four children: 
Albert M., now connected with the Rocky Moun- 
tain News; Lewis, a student in Champaign, III.; 
Mary R. and Elizabeth. Mary M., the youngest 
member of the Rosborough family, is the wife of 
the Rev. Hugh Y. Leiper, of Pravo, Ohio. They 
have had five children: William, Hugh. Earl (de- 
ceased), Donald and Mary. 
In 1833 William Rosborough came to Illinois, 
locating in Randolph County, where he at once 
embarked in merchandising. In 1840 he removed 
to Sparta, and continued general merchandising 
in connection with the manufacture of castor oil. 
He also engaged in the packing business, and later 
in the flouring business. In 1882 he laid aside 
all business cares, and after living retired for three 
years, he was called to his final rest, at the age 
of eighty-three. In the accumulation of property 
he was very successful, but at no time did he sac- 
rifice his honor for temporal benefit. He had the 
confidence of his entire circle of acquaintances, 
who regarded his integrity as above question.