Since it's quite long, don't copy-paste all the previous translations, just write yours.
Feel free to either add the official translation or come up with one of your own (specify it though).
[flag=]en[/flag]
Stark: Winter is Coming
Targaryen: Fire and Blood
Lannister: Hear Me Roar!
Baratheon: Ours is the Fury
Tyrell: Growing Strong
Tully: Family, Duty, Honor
Arryn: As High as Honor
Martell: Unbowed, Unbent, Unbroken