In one of the quotes for Follow The Sun either Irui or Gan Eden itself will call out "Teffelin" kaihou, so its possible that's the Dragons name, it's unknown at this time if that also holds true for Geber.
It's Tefillin: Beginning of wikipedia entry: "Tefillin (Askhenazic: pron.: /ˈtfɪlɨn/; Israeli Hebrew: [tfiˈlin], תפילין) also called phylacteries (/fɪˈlæktəriːz/ from Ancient Greek phylacterion, form of phylássein, φυλάσσειν meaning "to guard, protect") are a set of small black leather boxes containing scrolls of parchment inscribed with verses from the Torah, which are worn by observant Jews during weekday morning prayers." In other words, it's referring to a "box" being unsealed.