Jack. There is INDEED a Green Castle, Missouri! Don't know who told you otherwise! It is in Sullivan, but toward Adair County. Other towns around it are Green City, Pennville, etc. For those of you still living down there...help these folks out! My dad was born near Pennville and lived in Green Castle and Green City while he was growing up. I will ask him if he knows any Snyders. Marsha Sears Researching SEARS, MCDOWELL, PICKERING, PITTMAN, RODGERS, YARDLEY and many others.