Possibly, although Dayne/Martell relations in this period are rather confusing. On the one hand, the Daynes backed the Martells during Nymeria’s Conquest, and Davos Dayne was Nymeria’s third husband.
However, the fact that Nymeria had Vorian Dayne, the Sword of the Morning himself, sent to the Wall in chains speaks to some serious breakdown in relations during this period. Probably didn’t help that Nymeria had her Martell daughter not her Dayne son named as the next Princess of Dorne.
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