Katie, your very welcome. Today I've found John Lusk's siblings. He was the 4th of 8 children
Frantisek, Wenceslaus, Antonin, John, Maria, Joseph, Maria, Joseph. John, Wenceslaus, and Frantisek were the only children to survive.
John Lusk married Anna Jensi, also seen as Jenssi, but I haven't found the record yet. There are Jensi's in Skocice and Chvaletice.