Genealogy / Herszlewicz and Gdalywicz [8]

My recently deceased father hailed from a village in Sosnowiec. He had a chance to visit his homeland for the first time in 60+ years since emigrating to Canada, just before he died. He was so thankful to have gone home to see his birthplace.

Most of my family is from Poland but most of them have passed away and I don't have access to their recollections of where their families were from or what the origins of our names are.

My surname is now spelled Herskowitz, but I know its original spelling was Herszlewicz. Son of ...?

My maternal grandmother's maiden name was Gdalywicz, but it was Anglicized on her emigration to North America to Davis (!!). Any information about what either name means would be so helpful to me.

Appreciatively,

Amy