Merriam-Webster: 'Goodbye' is an alteration of 'God be with you.' Sean Kress: Do you have evidence to back this up? If so can you explain what 'good night', 'good morning' and 'good evening' are alterations of? Readers added context they thought people might want to know: The etymology of 'goodbye' as an alteration of 'God be with you' is documente