Although I have a different number of children my information seems to match yours very well!
I think your William is definitely my Francis's brother as the given names in both families are common
. I agree!What I have is that Martin Darcy and Julia McCormack (sometimes with an 'i') married in Kilcooley i 1827.
They had 6 children: Thomas, Francis, Martin, Denis, William and Jane.
William and Jane stayed in Ireland.
Did Thomas stay in Ireland?Francis Martin and Denis went to Australia.
Thomas (died Ireland 1908) married Honora McNeeve. 9 children
I have found nine recordsFrancis (born Tulsk 1829; died Melbourne 1913) married Honora McCormack. 10 children
Did he marry and have his children in Australia?Denis (born Elphin 1836, died Victoria Australia1911) married Bridget Byrne nee Kelly. 4 children.
Did he marry and have his children in Australia?William (born Tulsk, died 1920 Ireland) married Catherine McCormack Elphin, 4 March 1867. 13 children. Five went to America. None of their 3 sons married so the Darcy line ended. Catherine was born in Kilcooley, daughter of Michael McCormack and Brigid Brennan.
I have from the 1911 Census that they had 10 children but this of course was not always correctEleven of their children's names as I have were:
Maria (died USA)
I have born May 28 1870 died Jan 24 1945 Rhode Island USA unmarriedCatherine (nun died South Africa)
I have born Sep 01 1876 - no other detailsJane (married ? Heron,died USA)
I have born Jun 20 1880 - no other detailsJulia (married ? Gilroy, died USA)
I have born May 11 1872 She married William GILROY and had at least four children; William, Lawrence, Julia and Catherine; she died Feb 10 1944 Rhode Island USA unmarriedBridget (married ? O'Brien, died USA)
I have born May 29 1874 - no other detailsMartin (born 1868, died USA)
I have born Jun 23 1868 died Oct 02 1938Elizabeth (born 1878)
I have born Nov 18 1878 - no other detailsJohn (B. 1880)
I DID NOT HAVETeresa ((b. 1884)
I have born Apr 26 1884 she married John CONNOLLY/CONNELLY/CONNEELY and lived at Castleplunkett MilltownDenis (born 1886, died Tulsk)
I cannot locate a birth for Denis but he is shown as 11 in 1901 and 26 in 1911 which implies a 5 year variance in his date of birth; I also cannot see a death for a Denis D'ArcyEmily (b. 1890)
I have born ??Roscommon Jul-Sep 1890 V2P244 Possibly died ??Roscommon Jan-Mar 1938 V3 P1811911 Census for William and Catherine1901 Census for William and Catherine1901 Census for Martin D'Arcy