Sysaks...my family tree ties into this family name as my 5th great grandmother was Helena Sysak (1778).
These people were from the Carpathian Mountains and lived there for centuries. Many many Catholic records on these families. Check with the LDS Family history center for records. Many lived in Bieliczna,Grybow, Galicia,Austria before WW2 now it is a part of Poland. Good luck!!!