Jefferson was the son of John and Ann Amelia (Schultz) Lowmaster Sr. His birth record is from Christ Lutheran Church, York County, Pennsylvania. He married Louisa Albert on May 27, 1847 in Wyandot County, Ohio. He died in a hunting accident. The couple had seven children: Jefferson Winfield; Millard Filmore; Willis; Charles W.; Alvin; Laura; and Martha Louisa.

SENECA ADVERTISER TIFFIN OHIO
November 1874

NOT FOUND YET

Mr. A. J. (sic) Lowmster, of McCutchenville, who went to Henry County on a hunting expedition about two weeks ago, has not yet been heard from and nothing is known of his whereabouts. Various rumors have been affoat (sic) that his body had been found in he woods, he having been shot, but late dispatches state that this is untrue. He was last heard from at his brothers, in Henry county, where he left his carpet sack, and then went to a neighbors about two miles distant. His family are in great trouble at his mysterijous disappearance, and fear that he has met with an accident of a fatal nature.

LATER - On Tuesday Lowmaster's decay was found in the Big Woods in Henry County, about eight miles from Napoleon, by a boy who was out hunting cows. He had shot a deer and being in a tree at the time, it is supposed he fell from it, as his skull was fractured. His body was much decomposed having lain there nearly three weeks. The remains will be brought home for interment.

SENECA ADVERTISER TIFFING OHIO

THE NAPOLEON NORTHWEST has the following in regard to teh death of A. J. (sic) Lowaster, of McCutchenville:

On Tuesday, a young man who was in the woods deer hunting, saw the body lying in a heap of brush about 1 1/2 miles from Racy's. The Coroner was notified, an inquest was held, and a verdict rendered of accidental death. His gun was found lying near, empty, and a dead deer some eight rods away. It was clear to the jury that Mr. Lowmaster had climbed upon the brush heap and after discharging his gun at the deer, lost his ballance and fell to the ground, a distance of some eight feet, striking his head upon a chunk of wood, fracturing his skull, which produced death. Nothing was found disturbed upon the body.