From A Wiki of Ice and Fire
The Tarth triplets were members of House Tarth during the reign of King Aegon I Targaryen. Their given names have not been revealed.
During the early reign of King Aegon I Targaryen, the wife of the Evenstar of Tarth gave birth to triplets daughters. Aegon's sister-wife, Queen Rhaenys Targaryen, arranged betrothals for the girls with members of Houses Corbray, Hightower, and Harlaw.
- ↑ 1.0 1.1 Fire & Blood, Three Heads Had the Dragon - Governance Under King Aegon I.