
Euron Greyjoy's armada owns
the Narrow Sea.
Game of Thrones Season 7, Episode 3

Of course, you would have friends
from across the Narrow Sea.
Game of Thrones Season 1, Episode 5

Across the Narrow Sea, your books are
filled with words like "usurper"
Game of Thrones Season 4, Episode 6

and across the Narrow
Sea a house, servants.
Game of Thrones Season 4, Episode 2

I need to cross the Narrow Sea.
Game of Thrones Season 2, Episode 6