Not-to-Be-Named One

A god, the husband of Shub-Niggurath, according to the Old Ones of K'n-yan [HPL Mound (online text)]. Elsewhere, Lovecraft's family tree of the gods lists Yog-Sothoth as the husband of Shub-Niggurath. [HPL Family (online text)] This would seem to imply that the Old Ones used "Not-to-be-Named One" as a euphemism for Yog-Sothoth.