Oliver Fillman was born on August 5, 1829 to Jacob and Esther Fillman. He lived with his parents through the 1850’s in Chester County, PA and worked with his father as a farmer. However, by 1860 he was able to pass the bar and began practicing law. By that time, he had also married Emeline Fillman and the two resided in Norristown.

When the Civil War began, he volunteered to serve in the 51st PA Volunteer Regiment, enlisting in September 1861. Two early and major battles of the war the 51st PA Volunteers fought in during his time of service included Antietam and Fredericksburg. However, by March of 1863 he was discharged for wounds he received during combat in 1862

Oliver remained in Norristown for the rest of his life, but did not continue the practice of law. By 1880 he was working as a boiler maker. The 1910 census lists him and his wife as living together at 552 Green Street in Norristown. At the age of 82, Oliver passed away and is now buried in the Montgomery Cemetery with his wife. They had no children.