I have some collateral information on Zeh which I received during my search for the Chadderdon line.However,I do not have Ira.All my Zeh's originated from Scholarie Co. in NY,From the dates I would say that your Ira is either an unlisted brother to the siblings I have or a cousin.If you would like me to put you in touch with the researcher whom I received the information from please contact me at corkyc.@pacbell.net My ggggggrandmother was Catherine Zeh b. 1793. She married Peter J. Mattice in 1810.Their last child in my information was b. 1839 which is close to the date you are looking for.I would just about bet that your Ira is a nephew to Catherine.