Los Tres Osirisos

In the beginning ... there was Geb, Osiris, and Horus (Elder). These three were decreased that Horus (Younger) might increase. Horus the Elder, upon being defeated by Seth, was renamed Horus who is in Osiris. We also found that Geb/Reuben figures could become "The Osiris". The Shem (Aaron) type was strongly identified with Osiris, as well.

There is then a basis in myth for more than one "Osiris" to precede a new Horus.

In the case of Tutankhamun, it was pharaoh Aye that took charge of his "Osirification". This included planning the attack in which Tut was killed along with his embalming and burial. At the same time Aye/Sheshonq did away with the rebellious prince Harsiese B and suppressed the priest Iuwelot/Maya (Zechariah) that patronized Harsiese. Another savior-figure, Seti/Sheshonq III, rose up to take the place of Tut and Harsiese. See:
(starting with the section "The Seti Temple Project")

In the Gospels, the "Osirification" of Jesus of Nazareth is supervised by Herod Antipas (in the assumed role of Aye/Ahab). As part of this particular variation on the Osiris theme, Jesus escapes a literal death, but other high-ranking persons are killed in his place. After the event, Jesus would have identified more with Seti/Sheshonq III than with the fallen Tut.