Hello I'm looking for information from my mom's side of the family who were said to be at the Duffy's and then married someone and their name changed to showers or schoeners

I'm not really sure how to spell the second surname, my grandma wasn't really clear on that before she passed away and I did a little research my family had a picture of my great ancestors from Ireland their names were Duffy that I know of my grandma's original name was showing her or Shonrer I'm not sure on the spelling, any information would be appreciated, I've gone to a local Irish store and asked him about my possible heritage and he told me a few things