margaret anne o'leary frederick

Hi!   My grandfather, John J. O'leary and his brother,  Jim Leary came from Kilgarvan to Chicago, Illinois. USA  They grew up on a dairy farm. They were a group of 10 siblings.  There was a sister  Birdie and their mother's name was Polly.   Does anybody know of this family?   Jim Leary, nephew of my grandfather, and son of Jim Leary,  went to visit years ago.  I am very interested because my DNA with Ancestry.Com shows a lot cousins  that are looking for their relatives.  Would like to know of anyone in the states, especially the Chicago area.   There was a posting of the  O'Leary farm sold.  I wonder if this was the old family farm.   Please get in touch.  Thanks so much!