Jonas Prevoncha was listed as a sailor in the 1890 Sandusky City Directory. He resided at the northwest corner of Hancock and Monroe Streets. During the Civil War, Jonas Prevonsha served in the United States Navy on the U.S.S. Carondelet, a Union ironclad gunboat.
According to the obituary of Jonas Prevonsha (sometimes spelled Provonsha), Jonas died in Ward D at the hospital of Ohio Soldiers' and Sailors' Home on March 18, 1918. Obituaries for persons who died in the Sandusky area in 1918 have been compiled in a notebook on file at the Sandusky Library. Jonas Prevonsha was 90 years old at the time of his death.He had been admitted to the Ohio Soldiers' and Sailors' Home on June 22, 1892. His nearest of kin was Alonzo Prevonsha, of Sandusky. Funeral services for Jonas Prevonsha were held at the home of Mr. and Mrs. J. Hornig. Burial was in the cemetery of what is now known as the Ohio Veterans Home.