I'm Looking for informatiom on the following :

Great (3x) Grandmother, Lady Catherine Sheridan, Sheridan, was her maiden name. She was the first Lady in waiting to Mary Queen of Scots. She was also captured and executed the same time Mary Queen of Scots was.

Great (2x) Grandmother, Lady Catherine Sheridan. This lady was a, sounds like, Da(o)ckerles, John. Never married.

Great Grandmother, Lady Catherine Sherian, her married (not sure), name was Hogan.

My Grandmother was, Lady Mary Katherine Hogan.
Born 1893 (give or take 2 years). Place of Birth was Carlow Co., Ireland.
She also had a sister, Susan (Winafred) Hogan, who had a daughter, in Ireland