Would you have any additional information on him their are several John McManhan or McManhon can you confirm if this is your ancestor please follow link, where he is buried. https://www.findagrave.com/memorial/27148791/john-mcmahan
My John McMahan/McMahon died in Fayette Co Ohio in about 1838 and has a SAR Marker in Ross Co Ohio
I do have a copy of his actual pension, I just want to now if this other information I found from Belmont Co Ohio might have more information
Thank you for posting your question on History Hub!
We searched the National Archives Catalog and located Case Files of Pension and Bounty-Land Warrant Applications Based on Revolutionary War Service in the Records of the Veterans Administration (Record Group 15). Some records are digitized but not all. Other records that may have files pertaining to John McMahan include the Records of the Adjutant General's Office, 1762 -1917 (Record Group 94) and the Records of the Accounting Officers of the Department of Treasury (Record Group 217). For access to and/or copies, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org. Please ask RDT1 to conduct a search of these records for John McMahan final pension payment voucher to his widow and other related matters and we also ask that you provide those numbers (NARA Identifier # with also a HMS Entry #) when we correspond with us.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information is helpful and best of luck with your research!