I’m sorry I took so long to respond but the answer is yes, our lines are related. Your GGGrandfather, Harrison Doshier was the son of John Doshier b. 1802 d. unknown and Rachel Spears/Pain b. 1802 and d. 1850. Their children were as follows:
Samuel Spears Doshier b. 1825 James Calvin Bird Belle Doshier b. May 1826 Nancy Doshier b. 1828 Female Doshier b. 1829 Harrison Doshier b. May 1, 1830 Unknown female Doshier b. 1833 Margaret Doshier b. 1835 Joseph Doshier b. 1837 Elijah Doshier b. 1840 Elizabeth Doshier b. 1845
Your GGGGrandfather was Peter Doshier, b. November 2, 1762 in PA and d. August 6, 1838 in IL. Peter married Alley Prittchett (b. abt 1770 and d. after May 12, 1857) June 20, 1790 in TN. Their children were as follows:
Margaret Doshier b. February 1791 Nancy Doshier b. April 1793 Richard Pritchard Doshier b. 1794 (father of Thomas Harrison Doshier on my line) Daniel Doshier b. July 7, 1794 Henry Doshier b. January 29, 1801 John Doshier b. 1802 (father of Harrison Doshier on your line) Wiley Peter Doshier b. 1803 Adam Doshier b. 1809
Peter Doshier’s father was Johann Daniel Doshier who was born December 1740 in Germany and died August 6, 1838. Johann immigrated into the United States entering Philadelphia in 1750.
Peter Doshier was a Revolutionary War soldier serving as a Militiaman in Shenendoah County, Virginia. After completing one tour of duty, he served as a tour substitute for George Wolf of Shenendoah County.
Your GGGrandfather’s brother, James Calvin Bird Belle Doshier also served an interesting military history serving as a scout during the Indian Wars. On November 19, 1870, he was awarded the Medal of Honor for "Gallantry in action and on the march".