House Wyl of the Boneway is a house from Wyl in Dorne. It is one of the principal houses sworn to House Martell of Sunspear.
They blazon their banners with a black adder biting a heel on yellow.
The Wyls have long fought against the lords of the Dornish Marches to the north. The family has tunneled beneath their castle to link caverns for greater defense.
Wylla of Wyl was a warrior-maid who fought besides Yoren Yronwood against King Durran the Young at the Battle by the Bloody Pool and was turned back.
During the First Dornish War, the Wyl of Wyl ambushed and defeated the forces of Orys Baratheon as they attempted to assault the Boneway.
The son of the Wyl of Wyl, Walter Wyl fought beside the Vulture King during the reign of King Aenys.
During the final stage of the Conquest of Dorne, when Daeron I Targaryen was attacked and killed under the pretext of a peace banner and Prince Aemon Targaryen was imprisoned by the Wyls. Lord Wyl refused to free Aemon, when Baelor came to Dorne seeking peace. Baelor returned with the Prince of Dorne's acceptance for Aemon's release and Lord Wyl relented. However, instead of freeing Aemon himself, he gave Baelor the key to Aemon's cage and an invitation to use it. However, Aemon was now trapped inside a cage, naked and exposed to the elements. Below the cage, a pit had been dug and filled with many vipers. Baelor entered the pit and opened the cage, getting bitten by the vipers in the process. The Dragonknight was able thrust the door and and pull his cousin from the pit. The Wyls are said to have laid wagers as Prince Aemon struggled to climb out of the pit with his cousin flung across his back.