Konrad I Mazovia
Konrad I was born about 1187.

 Agafiya SVYATOSLAVICH
Agafiya was born about 1192 in Vladimir,Volynskiy,Volyn,Ukraine.  She died after August 31st, 1247.

 Kazimierz I KUJAVIA
Kazimierz I was born about 1211.  He died on December 14th, 1267.

 Boleslaw I MAZOVIA
Boleslaw I was born about 1215.

 Eudoksja MAZOVIA
Eudoksja was born about 1217.

 Ziemowit I Mazovia
Ziemowit I was born in 1224 in Czersk,Bydgoszcz,Poland.  He died at the age of 38 on June 23rd, 1262.