DOTLAN EveMaps

"And who are you, the proud lord said,
that I must bow so low?
Only a cat of a different coat,
that's all the truth I know.
In a coat of gold or a coat of red,
a lion still has claws,
And mine are long and sharp, my lord,
as long and sharp as yours.
And so he spoke, and so he spoke,
that lord of Castamere,
But now the rains weep o'er his hall,
with no one there to hear.
Yes now the rains weep o'er his hall,
and not a soul to hear."

House Reyne was obliterated after they rebelled against their liege lord, Tytos Lannister, who was perceived as weak by his own vassals. To restore Lannister dominance, Tytos's son, Tywin Lannister, marched against the upstart Lord of Castamere, Lord Roger Reyne, known as the "Red Lion of Castamere". By the end of the rebellion, Castamere had been put to the torch and all members of House Reyne executed. The title is thus a play on words, as the "rains" fall over the empty halls of the "Reynes" who have been killed to the last man, and "not a soul to hear".

The lyrics heavily reference the fact that the sigil of House Reyne was also a lion, but a red one instead of the golden lion used as the sigil of House Lannister. The rebellion of the Reynes against the Lannisters was thus seen as a civil war of lions.

http://www.imdb.com/title/tt0944947/

When you play the game of Holding Corps,
Either you win or you die...