House Strong

House Strong is an extinct noble house of the Riverlands. Their sigil was a tripartite pale blue, red, and green on white.

Their seat was the castle of Harrenhal, which was granted to them after the extinction of House Harroway. However, the Strongs also died out, like all the Houses to hold Harrenhal, and the castle was passed on to House Lothston.

In the books
In the A Song of Ice and Fire novels, House Strong's backstory is the same. Some descendants of the House live in exile in the Free Cities.