Don't know if this will help, but there is a Margaret Croan born about 1830 in Indiana to John Croan and Mary "Polly" Eshelman. In 1850 she was a resident of Lafayette Twp., Madison Co., Indiana in the household of Levi Thuawftan. I found this at freepages. genealogy.rootsweb.com/~damon/croan/croan002.htm.
Hope this is some help.