House Lannister of Lannisport is a cadet branch of House Lannister of Casterly Rock. Ruling over Lannisport, the Lannisters of Lannisport see their wealth derived from trade and commerce, rather than gold. Their sigil is a gold lion on a red field, and their words are, "Hear Me Roar."
The current ruler of Lannisport is Celia Lannister.
House Lannister of Lannisport has a long history of supporting their cousins in Casterly Rock. In the year 192 AC, however, Lord Jason Lannister, a prominent redcloak commander, revolted against Lord Tytos Lannister during Damon's revolt, capturing three of the Lannisters and killing two.
Lannisport was burned to the ground within a day of him coming to power, but was steadily rebuilt following the war. In the year 196, the Academy of Arts and Literature was founded, with Celia at it's head.