The Duchy of Pomerelia, also known as the Duchy of Eastern Pomerania and Gdańsk Pomerania, was a duchy centred on Pomerelia, with Gdańsk as its capital.

Świętopełk II, also known as Świętopełk II the Great, was the ruling Duke of Gdańsk from 1215 until his death. He was the first member of the Samborides to style himself dux from 1227 onwards.