House Lothston is an extinct noble house of the Riverlands. Their sigil was a black bat on per bend silver and gold.
House Lothston were a powerful house in their day, and were granted the lordship of Harrenhal after the failure of House Strong. The Lothston line was extinguished within living memory, and the rule of Harrenhal passed to House Whent.
Ben Blackthumb, a blacksmith of Harrenhal, worked for the last Lord Lothston as a boy.