From A Wiki of Ice and Fire
Lowlander is the name given by Vale mountain clansmen to people living outside of the Mountains of the Moon. Similarly, they refer to nobles as lowland lords.
Why should we trust your word? Lowland lords have lied to the clans before.
Kevan: By what right do you savages intrude on our councils ?
Conn: Savages, lowlander? We are free men, and free men by rights sit on all war councils.
- ↑ A Game of Thrones, Chapter 42, Tyrion VI.
- ↑ 2.0 2.1 2.2 A Game of Thrones, Chapter 56, Tyrion VII.