A record of the May genealogy compiled by Jeremy (Jerry) Pine can be downloaded here. This is a result of many years of work by Jerry. As with any family this large this record is already outdated, but it contains a lot of great information.
Below is the earliest photograph of a May. Isaac May was born in Kentucky September 7, 1814. He migrated to Decatur County Indiana prior to 1832 and to DeKalb Missouri in 1839.