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!