My suggestion for rulers of Swedish Pomerania:
House of Vasa
- Gustav II Adolph the Great (1611 - 1632)
- Christina (1632 - 1654)
House of Palatinate-Zweibrücken
- Charles X Gustav (1654 - 1660)
- Charles XI (1660 - 1697)
- Charles XII (1697 - 1718)
Sources:
https://en.wikipedia.org/wiki/List_of_Swedish_monarchs