|Information of this article, or portions of it, is conjecture based on information revealed in the A Song of Ice and Fire novels and may be subject to change. See "In the books" for further explanation
In the books
In the A Song of Ice and Fire novels, House Lonmouth is said to blazon their arms with quartered of six: red lips strewn on yellow, yellow skulls strewn on black. Hence, Richard Lonmouth was known as the "Knight of Skulls and Kisses".
The books also describe Richard Lonmouth as a close personal friend and squire of Prince Rhaegar Targaryen and was later knighted by him. Following his drinking game with Robert Baratheon at the Great Tourney at Harrenhal, he and Robert promised King Aerys II Targaryen that they would discover the true identity of the Knight of the Laughing Tree, but never did.
The books also mention one other member of House Lonmouth, Joffrey Lonmouth (aka the Knight of Kisses). He was close friends with Ser Laenor Velaryon, who named his son Prince Joffrey Velaryon after him.