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Below is a family biography included in the History of Allegheny County, Pennsylvania published in 1889 by A. Warner & Co.   These biographies are valuable for genealogy research in discovering missing ancestors or filling in the details of a family tree. Family biographies often include far more information than can be found in a census record or obituary.  Details will vary with each biography but will often include the date and place of birth, parent names including mothers' maiden name, name of wife including maiden name, her parents' names, name of children (including spouses if married), former places of residence, occupation details, military service, church and social organization affiliations, and more.  There are often ancestry details included that cannot be found in any other type of genealogical record.

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DAVID DEMPSEY, retired, post office Bennett, was born Aug. 22, 1828, in County Derry, Ireland, son of Daniel and Mary E. (McCalister) Dempsey. The father died in Ireland, and in 1831 the mother came to America with her children, and settled at Girty’s run, now Millvale, on the same place where David now resides; she rented thirty acres of land of William Sample, farmed this and built a home. Here she reared her six children: John (a bachelor), James (of Cincinnati), Mrs. Mary Quinn (of Mercer county), Mrs. Catharine Logrin, Mrs. Mary McGaghey (of Erie county) and David. The mother died in 1864, aged seventy-two years, a woman of remarkable courage, a devout Catholic, much beloved and esteemed. David Dempsey remained in this county, and for eleven years was employed in the rolling-mills, subsequently became captain of a steamboat for eleven years, since then has been teaming for Graft, Bennett & Co. He was married, in 1847, to Mary Disert, who died, leaving six children, viz.: Richard, John, Lillie, Maggie, James and Alfred. His present wife was Mrs. Isabella Robinson, nee Lightcap, daughter of G. C. Lightcap, Sr., an old settler. They are members of the M. E. Church; politically he is a republican. He voted for W. H. Harrison, the whig, and hauled two logs for the campaign cabin.

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This family biography is one of 2,156 biographies included in the History of Allegheny County, Pennsylvania published in 1889 by A. Warner & Co.

View additional Allegheny County, Pennsylvania family biographies here: Allegheny County, Pennsylvania Biographies

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