A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Leora Oldessroth
Ankaer was a powerful Domani lord; he meets with Rodel Ituralde under the White Ribbon at Ituralde's request. Ankaer agrees to join forces with Ituralde to fight the Seanchan (CoT, Prologue). He stays with Rodel and is present when Rodel meets Rand and tells Wakeda that they need to trust Rodel's judgement as he has led them well. He is lanky (TGS, Ch. 10). He is killed battling Shadowspawn in Maradon (ToM, Ch. 32).
"We have to trust him Wakeda, he's led us right so far." (The Gathering Storm, Chapter 10)