It sounds like there may be a family connection here!
My husband John's great-great-great grandfather, Daniel Charles Bolster, was born in Mallow, County Cork, Ireland. Daniel's parents (per his death certificate) were John Bolster & Catherine Callahan. Daniel married Mary Sullivan in about 1864, and lived in Kanturk (a neighboring town) for several years before immigrating to Augusta, Georgia with their two children.

Daniel & Mary would ultimately have 11 children, but only 7 survived to adulthood. Their oldest child, Mary J. "Mamie" Bolster, is my husband's great-great grandmother.

Besides finding birth records for Mary Bolster (b. 31 Dec 1866 in Kanturk) and her little brother John Bolster (b. 9 Oct 1868 in Kanturk), we have had little luck in finding anything in Ireland. We do have a lot for the family after they arrived in America, and would be more than willing to share what we have on them.

If there is any family connection here, please let me know! We would love to learn more about the Bolsters!

Thanks!
Blessings,
Lydia James