Dorian Hightower's first wife

"When the Andals invaded Westeros, Lord Dorian Hightower told his wife of twenty years that wars are bad for trade. And to make his point, traded her for a young Andal princess."

- Qyburn Lady Hightower was the first wife of Dorian Hightower, the head of House Hightower during the Andal Invasion.

Biography
When the Andals invaded Westeros, Lady Hightower was in her twentieth year. Dorian told her that wars have a negative impact on trade, and abandoned her to marry a young Andal princess.

Reference

 * Oldtown (Histories & Lore)