1. House Blacktyde
(Houses of Westeros/Minor Houses)

Sigil: Vairy green and black. House Blacktyde is a sworn bannerhouse of House Greyjoy.  ...

2. Blacktyde
(World of Westeros/Strongholds)

Seat of House Blacktyde. ...

3. The Iron Islands
(World of Westeros/Geography)

... Saltcliffe, Blacktyde, and dozens of smaller crags and islets, some so tiny that they can barely host a single village. Life on the Iron Islands is hard, but its people endure and remember a proud past. ...