Swatopolk Duke of Pomerania
Swatopolk Duke of was born about 1060.  He died in 1122.

 Wartislaw I Pomerania
Wartislaw I was born about 1094.  He died in 1136.

 Ratibor I Duke Pomerania-Schlawe
Ratibor I Duke was born about 1098.  He died on May 7th, 1155.

 Pomerania
Pomerania is no longer alive.