Chicomecoatl and Chimalman

I think these two goddesses must be related - I found them in Barbara Walker's "The Woman's Encyclopedia of Myths and Secrets" --

Chicomecoatl
Mexican Goddess similar to Demeter, called Heart of the Earth, and ancestress of all peoples.  No god could equal her in power.  She was usually accompanied by a young savior son, a fertility-sacrifice.  Her angelic messengers were seven serpents.(1)

Notes:
Neumann, G.M., 182.

Chimalman
Virgin mother of the Aztec savior Quetzalcoatl; one of "three divine sisters."  She was the same Triple Goddess worshipped around the world in Virgin, Mother, and Crone aspects.  See Trinity.

So it doesn't seem to make any difference - Old World or New World - the goddess archetypes are the same.