So "
Goodbye"
from middle English "
godbwye"
which is a short form of "
God be"
which is a short form of "
God be with you".
As in French "
adieu" and Spanish "
adios".
"Good bye" is a short form of "God be with you" (until we meet again).
How many times have you said "
goodbye" to someone? One would think it has the same origins as "
good day" or "
good night" but this is not so.
The expression "
goodbye" comes from the Middle English "
godbwye" which is a contraction of "
god" for "
God" and "
be with you" or "
be with ye".