Southerner vs. Southron — Which is Correct Spelling?

A native or inhabitant of the south, especially the southern United States.

A native or inhabitant of the south of a region (or of the world as a whole), such as the United Kingdom.

Alternative case form of Southerner.

An inhabitant or native of the south, esp. of the Southern States of North America; opposed to Northerner.

An American who lives in the South