Ulf the Ill
Ulf, better known as Ulf the Ill, is an ironborn raider.

Uller
There are two Ullers: House Uller: A house in Dorne Uller (ironborn): an ironborn sailer

Uller (ironborn)
Uller is an ironborn sailor. He has three brothers, Qarl, Skyte and Eldiss. He is sworn to Balon Greyjoy.

Ulmer
Ulmer is a ranger of the Night’s Watch. He is a former member of the Kingswood Brotherhood. He is stooped with a grey beard.

Ulthos
Ulthos is a landmass in the far east which may or my not be another continent. It lies to the south of Asshai and the Shadow Lands in Essos and to the east of Sothoryos. It is separated from the Shadow Lands by the Saffron Straits. The island of Ulos is located in the straits between Ulthos and Essos. Almost nothing is known about Ulthos, other than its location and that it is covered in dense jungle.

Ulwyck Uller
Ser Ulwyck Uller is the younger brother of Lord Harmen Uller.