I am also researching a SEBEST family that came from Czechslovakia.According to John SEBEST's baptism certificate he was b. in Vikatovciach Paprad Spisskom, Czechslovakia.I have no idea if this is anywhere near where your SEBEST's are from.I do know that he always told my husband, [his grandson] that he came from Vienna.
I also know that his parent's names were: father:Matey SEBESTmother:Maria GROFCIK & would assume that they were from the same area.I have no information on if he had any siblings.
John became a Naturalized Citizen in 1917 - I don't know when he came to the US.
I hope that we can be of some help to each other! Happy Hunting! Rolayne SMITH KASMER -- email@example.com