Lyman Lannister

Lyman Lannister was a distant cousin to the main branch of House Lannister and an ally of Lord Andros.

Background
A distant cousin to the main House Lannister, Lyman participated in and was wounded at the Tourney at Lannisport. After hitting his head, he became addicted to milk of the poppy, which he continued to use for many years afterward.

"Sons of Winter"
Having allied himself with Lord Andros, a merchant lord, Lyman shared his secrets and coin with the other man. Andros had previously come into conflict with Tyrion Lannister, the Hand of the King, in regard to his ironwood contract with the king. After Tyrion was arrested for the murder of Joffrey Baratheon, however, Andros sought out Lyman and brought him into his business dealings.