A interesting project would be to find the many 'custom named ' sections of streets. In bygone days these names would have been applied before the street name when addressing letters.
Since the Royal Mail Post Office organised the addressing system with post codes their usage fell out of fashion. Many of the names would have been of family members of the developers or land owners family or a place that conjured happy memories or hopes for the future.
A few that come to mind;
In Church Street from the Fergus Hall (the old Church Street School) to just before the old Labour Exchange, now TNT offices, the section is called Millicent Terrace. This name comes from a Miss Millicent Sparrow who married Lord Mandeville in 1822, who later became the 6th Duke of Manchester. As it happens, to this day the ground rent of that row and most of Church Street and other parts of town is paid to the Duke of Manchester's Estate which is managed by appointed trustees.
Part of West Street on the right hand-side before the junction with Charles St./Brownstown Rd./ Loughgall Rd.; 'Sunshine Villas'
Part of Armagh Road on the left before Kingsway Drive; 'Bellevue Place'
Part of Obins Street opposite Abicoil Springs factory; 'Bognor Terrace'
Part of Garvaghy Road, opposite the old Achesons Weaving Factory. 'Victoria Terrace'
Part of Garvaghy Road, row set-in off main road to the left of the People's Park entrance, now demolished; 'Parkmount'
Part of the Tandragee Road, (the Annagh) just after the entrance to Carrickdale Gardens; 'Hopefield Terrace'
There are dozens more, mostly forgotten, a few still have a plaque mounted with name visible, sadly most of the name signs have disappeared.
Hope this gives food for thought and maybe preserve another piece of disappearing old Portadown.
Cheers, Jim.