Genealogy / What does my Polish name mean? [400]

Lookin for meaning of surnames of Szmulik and Hewczak. I have found much history on my Szmulik ancestors living in Jawornik Polski dating back from the mid 1700's through early 1900's. I cannot find anything on what the surname of Szmulik means. I also have Hewczak as a Polish surname and I know it is sometimes spelled Hewczuk. I would like to know the meaning of Hewczsk and its origin. I have records of my Polish Hewczak ancestors from Skalat, but that is in the Ukraine.