Thmyl Wyb Brw 9 -

So Atbash gives: "gsnbo dby yid 9" — not obviously meaningful.

Could you clarify what you mean by this?

Last 9 stays 9 .

If it's :

"thmyl wyb brw 9"

So "guzly jlo oej 9" — also not clear.

Second word wyb → dby

Could it be (each letter shifted to a neighbor key)?

thmyl → guzly wyb → jlo brw → oej

Third word brw → yid