Further research also shows worship by Fenrir, Jormungand, Hecate, Hiisi, Mictlantecuhtli (and his wife), Yenaldlooshi, Daityas, Leonard, Kali, Caillech, Belphegor, Furfur, Neit, Felorn, the Morrigan, and Arawn.
Yog Sothoth was remarkably restrained today, considering that I misspelled his name.