|Book(s)|| A Clash of Kings (mentioned)|
A Storm of Swords (mentioned)
A Feast for Crows (mentioned)
A Dance with Dragons (mentioned)
A Clash of Kings
A Storm of Swords
A Feast for Crows
The Appendix of A Feast for Crows states Lomas is the uncle of Stannis Baratheon, the father of Andrew Estermont, and the brother of Eldon Estermont. However, the Appendix of A Dance with Dragons states Lomas is the cousin of Stannis and the son of Eldon. See House Estermont/Theories.