>>16722291
>What shall it be called?

Orcus.
Assuming it's a large, mysterious, "hidden", gas giant: Orcus.
Orcus is an (obscure) Roman god, of the underworld, death, the suffering of evil people, and randomly dying in the wilderness. Orcus might also be where we get the word Ogre and where Tolkien "may have" gotten Orc from. I'd name it Orcus.