I am a bit confused with the infos. Patrick Dwyer married to Margaret Todd in 1868. He was not from Annacarty (South Tipperary) but from Gortmahonoge (North Tipperary). They married in Kilcommon Church (North Tipperary). I thought Thomas Todd & Catherine Breen and their daughter Margaret Todd were also from Gortmahonoge since they married in Kilcommon Church (bride's parish?) but in fact I do not know.
My Grandmother Catherine Dwyer (b1874), daughter of Patrick Dwyer & Margaret Todd, married James Dwyer (b 1870) from Annacarty (son of Jeremiah Dwyer & Bridget Mulcahy...
Her younger sister Bridget Mary Dwyer (b1886) married a Cahill. Her grandaughter Tricia Cahill is living in California.