KathleenG on Family Tree Circles

Further to my first post I have some names that may be siblings of my grandfather William Harrison born circa 1870 in Ireland. They are George Thomas Harrison born 1 Jan 1872, Elizabeth Harrison born 3 Feb 1868 and Richard Harrison born 28 Nov 1864. I would like to find some of their descendants.

My maiden name is Harrison and I am trying to find descendants of Richard Harrison of Delgany, Co. Wicklow, Ireland who married Jane MacKenna of Monkstown, Co. Dublin on 27th August 1860. They had a son William Harrison who Married Catherine Carroll on 28th January 1893. William Harrison was my grandfather. He probably had siblings and I would like to find out who they were and if there are any descendants who are living and might be able to fill in the gaps for me