Gloria, Thank you for your response to my query. I will try to make what I am looking for more clear. Jesse Job McColpin, who was born in Crawford County abt. 1831. He married Elizabeth Higgins in Crawford County in 1850. There are documents that spell his name as both McColpin and as McCorpin. I subscribe to a Scotch-Irish group and it is often discussed how S-I names are changed because many, if not most, people in that period of US History signed there name with an X or their mark. Being rather new at Illinois genealogy I was wondering if McCorpin or McCorpin may have been a variation of the Family name for which Macoupin County was named. <Don't know of a surname of any variation of Macoupin in Macoupin <County if that is what you mean?? <Macoupin has been spelled Macoupin since the formation of the county. <McCoupin, McCorpin and McColpin - are those surnames you are trying <to find?? <Please make clearer. And, if they are surnames, give us some <"about" dates. Thanks. Gloria <<There seems to be variations of the same name in 19th century Illinois. <>