Originally, the subject intervened between stp and zꜣ, but in later times it often appeared twice, once after stp and once after zꜣ. By the Greco-Roman Period, it had shifted to appearing only after zꜣ.
Since the Middle Kingdom, the object is sometimes attached to zꜣ as a direct genitive or a suffix pronoun instead of following a preposition.
6th Dynasty, Giza, Western Cemetery, Shaft G 2188 Y, Block of sunk relief inscription mentioning the dog Abutiu (35-10-22/Cairo JE 67573), lines 1–2:[1]
ṯzm wnn stp-zꜣ r ḥm.f ꜥbwtjw rn.f
The hound that was the protector of His Majesty. His name is Abutiu.
used as a component of various other titles; see the Derived Terms section below[Old Kingdom, Middle Kingdom, and 26th Dynasty]
James P[eter] Allen (2010) Middle Egyptian: An Introduction to the Language and Culture of Hieroglyphs, 2nd edition, Cambridge: Cambridge University Press, →ISBN, page 221.
^ Reisner, George A. (1936) “The Dog which was Honored by the King of Upper and Lower Egypt” in Bulletin of the Museum of Fine Arts, volume XXXIV, number 206, pages 96–99