Hi,
I have the siblings as William, Agnes, David & Robert, but not Patrick.
Their father William (b. ca 1836) and I believe the grandfather may have also been William Junkin b. ca 1801). (so many hard to decipher). Ballynure cemetery.
I believe Robert died quite young. Agnes married James Moore in 1889. I remember meeting William Moore as a young child, a farmer from the Ballynure area.
I know the name changed to Jenkins for some reason, so it could be William & David Jenkins on the 01/11 census.
Terry