McKee - Tulla

I am researching Dennis McKee and Mary McMahon.

Various shipping records I have show “Dennis & Mary. Father dead. Mother living Parish of Feakle, Co. Clare” or “Dennis & Mary. Father dead. Mother living at Isle(?) Clare [There is a townland in Feakle, Co. Clare called Islandmore whether this is what was meant is unsure] or "Dennis & Mary. Father dead. Mother on board." The latter shipping record has a notation “Feakle, County Clare also Facal (sic), Tulla, Co. Clare. Two sons & two daughters, Bridget McKee. Morpeth.” Morpeth is in the Upper Hunter District of New South Wales, Australia.

Their children, based on these shipping records, were:
Name                  Ship              Arrived in Sydney
Honora McRee    Matoaka           17/05/1855
Dennis McKee    Glen Isla           02/07/1857
William McKee   Glen Isla           02/07/1857
Mary McKee       Spitfire              24/08/1863

There also appear to have been two more children, but I can only link them by Immigration deposit payments they made or were made for them, viz.

Name                                 Ship                            Arrived in Sydney    Comment
Patrick McKee (cousin?)   Star of Brunswick        18/12/1865             Immigration Deposit paid by Honora McKee. Patrick came from Tulla, County Clare (close to Feakle).
Bridget McKee                   Telegraph                   15/10/1860              Immigration Deposit paid by Honora McKee. Bridget came from Kilnoe Parish, Co. Clare, Ireland

I was wondering if someone could identify these people, and let me know dates of birth; and especially Dennis's (Denis)  date of birth, marrriage and death. Maybe he died in the Potato Famine years and his date of death and place of burial is unknown???