The definition of a southron is a term for a southerner, used in Scotland to refer to the English and in the U.S. to a person from the southern U.S.(noun)
An example of a southron is a person from Georgia.
See southron in Webster's New World College Dictionary
Origin: LME sothron, altered (prob. modeled on Briton, Saxon) < southren, dial. var. of southern
See southron in American Heritage Dictionary 4
Origin: Middle English
Origin: , variant of southerne, southern; see Southern.