The Muses:

Clio (history) Urania (astronmy) Melpomene (tragedy) Thalia (comedy) Terpsichore (choral song and dance) Calliope (epic poetry) Erato (erotic poetry) Polyhymnia (religious hymns) Euterpe (lyric poetry) daughters of Zeus and Mnemosyne, they are goddesses of music, song, and dance; the source of inspiration to poets; and the keepers of knowledge, remembering all that has or ever shall come to pass.

The Graces:

Aglaia (splendor) Euphrosyne (mirth) Thalia (good cheer) born of Zeus and Eurynome, the goddesses of grace, beauty, adornment, mirth, festivity, dance, and song are the attendants of both Aphrodite and Hera.