A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Leora Oldessroth
Alwin Rael is a man residing in Lady Arilyn's house in Cairhien. When Egwene tries to eavesdrop on the conversations of the Aes Sedai Elaida sends to Cairhien, she picks up on a conversation between maids about Alwin Rael.
(Reference: Lord of Chaos, Chapter 25).