looking for info on Patrick Fitzsimmons and Eliza Deegan

Looking for record of Marriage and who the parents are for Patrick fitzsimmons and Eliza Deegan,

I was able to get records of Baptisms for the following children listed with the above parents:

Patrick joseph Fitzsimmons Birth 19 Mar 1879 in Antrim, Ireland (He may have died in 1880 but I  have not been able to confirm this any help to confirm this would be appreciated)

William Fitzsimmons Birth 9 Feb 1881 in Kircubbin, Down, Northern Ireland (William died in Scotland in 1954 )

John Fitzsimons Birth 21-Apr-1883 in Kircubbin, Down, Northern Ireland.  Help to trace John or any descendants would be appreciated. He is not listed with the rest of the family in the 1901 Census

James Fitzsimmons Birth 16-Jan-1886 in Donaghadee, Down, Northern Ireland (Help to trace James or any of his descendants would be appreciated.  He is not listed with the rest of the family in the 1901 census)

Joseph Fitzsimmons Birth 16-Jan-1886 in Donaghadee, Down, Northern Ireland (Help to trace Joseph would be appreciated I did find some records indicated that perhaps he was on the HMS Black Prince as a Boy 2nd Class the information matches date of Baptism and birth town. He left the service in 1908 and i have not been able to find any information after that time.  any help would be appreciated)

Michael Fitzsimmons Birth 02-Nov-1888 in Donaghadee, Down, Northern Ireland  (Michael died in Scotland in 1955)

Patrick Fitzsimmons Birth 13 Dec 1891 in Donaghadee, Down, Northern Ireland ( Help to trace Patrick or any of his descendants would be appreciated. Listed with his father in the 1901 census)

Mary Fitzsimmons Birth 4 May 1895 in Portavoe, Down, Northern Ireland (Not listed with her father in the 1901 census wondering if she was adopted  as her mother possibly died when she was a few months old.  I have not been able to find any further information on her)

Any further information on any of the above family members would be greatly appreciated.

Thanks