I found in the 1870 census for Preble Co.in Lanier Twp., William Gilbert farmer 43 m MD, Julia 41 f MD, Ida 15 f O, Anna L. 13 f O, and John D. 10 m O.They were living next door to David Fisher farmer 42 m MD, Sarah 41 f O, Ira 17 m O, Clara 15 f O, Christian 9 m O, Ellie 6 f O, Rose 5 f O, Dolly 2 f O, and Francis JONES 20 m MD.I suppose Francis was a hired hand, or he could be a relative somehow since he was born in MD.In Harrison Twp., I found George L. Gilbert preacher 49 m MD, Hannah 39 f PA, Sarah C. 14 f O, Webster A. 8 m O, Edward L. 3 m O, Franklin J. 3 m O, and Ida 37 f O.In the 1880 census I found in Gratis Twp. Charles Gilbert farmer 33 m MD MD MD, Layann 30 f O MD MD, John M. 10 m O MD O, Letitia 8 f O MD O, Nettie 6 f O MD O, Maudie 3 f O MD O, and Jessie 2 m O MD O.In Lanier Twp. David Fisher farmer widower 52 m PA PA PA, Christian 19 m O PA O, Ellen 16 f O PA O, Rose 14 f O PA O, Dolly 12 f O PA O, and Kitty 8 f O PA O. Living close by was William Gilbert farmer 53 m MD MD MD, Julia 50 f MD MD MD, and John D. 20 m O MD MD.In Twin Twp. James Gilbert farmer 23 m MD MD MD, Mary 20 f O O O, Mary E. mother 53 f MD MD PA, Ezra brother 29 m MD PA? MD, Aaron brother 17 m MD PA? MD, Silas brother 14 m MD PA? MD, and David brother 11 m MD PA? MD.Also Thomas Gilbert farmer 30 m MD MD MD, Susan 30 f MD MD MD, Ida 8 f O MD MD, and Phillip 6 m MD MD MD.Also Caleb Gilbert farmer 28 m MD MD MD, Cath. Anabel 24 f O O O, Bertha 2 f O O O, Infant ( May) 1/12?O O O.In Monroe Twp.James Gilbert farmer 32 m MD, Mary 32 f O PA VA.In Gratis Twp.John Brandenburg farmer 26 m O PA O, Susan 27 f O PA O, Bertie 4 m O O O, E. Maudie 2 f O O O, Infant (May) 1/12 f O O O.I did find that George Gilbert was married to Cynthia Ann Borwn (Maybe Brown?), October 17, 1861 by Rev. John Weekly in Preble Co.George Gilbert is mentioned in the Preble Co. History Book of 1881 on page 328.William and Isaac Gilbert are mentioned in the Family History Book by the Preble Co. Historical Society in 1992 on pages 281-282.I can check those out if you want me to.They will be just mentioning them, not much info though.I did find out that a person who does a lot of genealogy research in our county wrote a family history piece about her family and her husband's. You may want to contact her since her or her husband's ancestor was Ezra Gilbert born September 1821 in Frederick Co. MD.Married 4 April 1847 and died 28 Sep 1878 in Preble.Since it is in MD, I thought you might be related.Her address is Mrs. Joseph (Audrey) Gilbert, 604 St. Rt. 503, West Alexandria, OH.She works in the library there and helps many people with their research.She can probably tell you if you are related.Let me know if there is any more information you need.I might be able to help.