Carolan ancestors

Hello. Im searching for information about my grandfather, Laurence Carolan. I have documentation that he was born on June 20, 1880 and baptized on June 21,1880. The parish listed is Dromcondrath, Drumcondra, Loughbracken. His father was James Carolan and mother was Catherine Byrnes. Birthplace was listed as Cloughrea. He had a sister, Agnes. She may have been born in June 1881 in Kells or March of 1882 somewhere else.Im sure there were more siblings. Laurence and Agnes lived in Kingscourt prior to coming to the US in the early 1900s. Any assistance locating information about James, Laurence or Agnes Carolan would be very much appreciated.

Thank you, Grace Carolan Boyle