The appearance of John in Old writing was Son sometimes Jhon, Jh as an S fallen Eastward, meanng Death came to the Heir by John's capture. It is true that Son & Sun are intended the same, Light of the Earth. There are many called Sons of God & One magnificent called the Son. God is happy with the confusion unless the person looks bad at the time.
The John is a place you pour unpleasantness, especially byproducts of dealings e.g. blame. Sons are awful for Resident Invader crimes. "Where's the John" means keep business discrete.
