John keeps his private life very private. When he married his wife Joan in Dec. 2008 it was after 5 years of under-the-radar dating (they never acknowledge in all that time that they were a couple - now that is discipline!). Last October he did announce that they were expecting and their first child was born in Nashville on Sunday.
They had a boy, who I'm going to guess, was named after Johnny Cash.
His name is Cash Rich!