A similar entry appears in the Wheel of Time Companion. Other information about the character is also included in the Companion, but we did not use it in the TarValon.Net Library.
Mistress Ayellin is a character briefly mentioned in the Eye of the World as someone who lives in Emond's Field itself. She may be one of the women whose full name is later revealed, such as Neysa Ayellin. (TEotW, Ch. 3)