House Tarly of Horn Hill is a noble house from the Reach and a vassal sworn to House Tyrell of Highgarden. Their stronghold is a castle known as Horn Hill and the head of the house is the Lord of Horn Hill. House Tarly has a militarist tradition, and possesses a Valyrian steel sword called Heartsbane.
The Tarly sigil is a striding huntsman, red on green. Their house words are "First in Battle."