My grandfather, August Jilk, emigrated to Chicago 1854 to joinn his brother, Joe Jilk. After several years he moved to Minnesota. I believe many/most Jilks in USA are related....it's a strange name. Family tradition says the CZ spelling was "JILEK". They lived in Dolne Dubroc in Northern CZ near Polish border. We no longer have contact with any CZ family. Hope this helps. Related??? larry Jilk