A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Kyria d'Oreyn
She is among the six sul'dam to accompany Tuon on The Victory of Kidron to the Westlands. During the voyage, she holds Lidya's leash. When the damane Foretells something that Tuon considers unpleasant, she has the damane punished. Since Ianelle is fond of Lidya, she did not like punishing her. The next day, Tuon orders her to put some ointment on Lidya's welts and give her something for the pain, which makes Ianelle smile slightly.
(Reference: Winter's Heart, Chapter 14)