Cxaxukluth

Name

Origin: (uncertain; appears to be a creation of Clark Ashton Smith, and perhaps only mentioned in that author's "Family Tree of the Gods")

In the Mythos

Cxaxukluth, androgynous cannibal spawn of Azathoth, and progenitor of Ghisghuth, Hzioulquoigmnzhah, and Tulu. Cxaxukluth came with its family (which already included Ghisguth's wife, Zstylzhemgni, and the infant Tsathoggua) to Yuggoth, where Cxaxukluth has most mercifully continued to sojourn throughout the aeons. ("The Family Tree of the Gods" by Clark Ashton Smith)

This Great Old One was mentioned by Clark Ashton Smith in his "Family Tree of the Gods".
It appeared for a long time like Cxaxukluth had (either directly or indirectly) spawned Cthulhu on the planet Vhoorl, however an obscure text elucidates us: a god called Ptmâk is the direct father of Cthulhu, and thus "brother" (and missing twin) to Cxaxukluth, making Ptmâk and Cxaxukluth the Hyperborean names for Nug and Yeb; Cxaxukluth is probably Yeb. (eldritchdark.com - a Hyperborean Dictionary)