If I get a chance later today I'll check a few more references and see if I can match with the address again
There is a good possibility that Hugh died prior to 1846 when Henrietta started being referred to but cannot be taken for granted.
Catherine's marriage church record 1843There is a witness named Arthur Faulkner who could provide a clue for your search
Presuming Catherine was 18+ would imply she was born before 1825
This then allow a logical conclusion that Hugh and Henrietta married between 1810 and 1825
Burke's Landed Gentry of Ireland, 1899 describes the marriage as to "
Kate, dau of Hugh Faulkner of Fort Faulkner, Co. Wicklow"Baptism in 1847 which may be a red herring but could be a lead (marriage of Arthur Faulkner to Louisa Anne DOWNING in 1847 shown in the Deputy Keeper of Ireland, Index to the Act or Grant Books, and to Original Wills, of the Diocese of Dublin 1272-1858 (26th, 30th and 31st Reports, 1894, 1899)
Civil Record of Marriage should show Father's name to help confirm
Baptism in 1849which may again be a red herring but as it ties two names and the location of Carlow my be a lead - son Arthur and father Hugh
Fort Faulkner still exists and is current an equestrian centre
There is some information on line on this family if you google various combinations of Faulkner/Wicklow; Faulkner/Carlow; etc.
This is an interesting link on papers held in the north on the extended family
I haven't read through completely but should be of valuable information
The status of the family implies that if you can pin point parishes you will possibly find details for their marriage and children etc.