The English name of this card is Latin for "Tortoise was God," literally.
This card's name could be a reference to a god named Om, who was featured in a book by Terry Pratchett titled "Small Gods". Om took the form of a turtle when people stopped believing in him.
Another possibility is that this card is meant to represent Kim Qui, a god in Chinese mythology known to take the form of a turtle.
There are similar myths in North American Aboriginal Mythology, where the World is on the back of a Turtle (which is God).
This card's Japanese name is a pun; Turtle (Kame) and God (Kami) have similar pronunciations. Most Japanese puns tend to be wordplays, even if the translated sentence makes little sense.
Only the German version of this card has a non-Latin name written "Die Schildkröte war göttlich". When you translate it into English, it would be "The turtle was divine".