“Pantocrator” is a Greek translation of two Old Testament names for God, YHWH Sabaoth (Lord GOD of Hosts) and El Shaddai (God Almighty). St. Paul used it once and it also appears several times in John’s Revelation; a more subtle meaning is “Sustainer of All.” Where “God Almighty” suggests what God can do, Pantocrator implies what God actually does: namely everything.