County Cork- Patrick Duggan and Julia Walsh

My great grandfather, Cornelius Dominic Duggan, immigrated to the US (Boston, Massachucetts), as an infant with his parents,

Patrick Duggan and Julia (Walsh).

Cornelius Duggan was born 27 Aug 1883, Glanmire Parish, County Cork.

Patrick and Julia were married 28 Jan 1882, at the Chapel at Glounthaune, Carrignavar, County Cork

The were both residents of Glanmire at the time. Patrick was a laborer. 

Patrick's father is listed as Cornelius Duggan (laborer).

Julia's father is listed as Patrick Walsh (laborer).

The witnesses were John Cashman and Bridget Walsh.

I have found a possible death record for Patrick's father, Cornelius, 21 Apr 1884. listed age 74, Glanmire, laborer, wife Mary present at his passing. Registered at Whitechurch, Cork

I have found a possible sibling for Patrick's. Hannah Duggan married Patrick Dooley, 28 Oct 1876. Hannah a resident of Glanmire, Patrick a resident of Riverstown. Hannah's father listed as Cornelius Duggan, laborer. Married at Castlejane, Whitechurch, Cork. Witnesses PATRICK DUGGAN and Anna Horgan.

I am interested in anything else I can find on Patrick and Julia's life in Ireland, or their parents or siblings.

Thank you!

Katie