These Mew were added to the box by the devs for Pokémon Yellow, presumably to run through the game and debug various features.
As these Mews were the only Mew added, and as such had predetermined DVs, it is to be noted that none of these had DVs that would result in a shiny.
It appears that Teruman was either a dev in the localization team, or just a remnant name that the localization team used.
It seems like that the OT Teruman is a reference to Teruki Murakawa, a developer credited in various releases of Pokémon.
(The same developer that was referenced in Gen 2's unused items name TERU-SAMA)
These Mew were extracted from the SAV, that was presumably used for debugging.
[We will not distribute the Debug ROMs and SAVs, and it is against our rules to ask for it]