The photo is definitely dated 1930.
Ferris Row was last mentioned in Wales Newspapers in 1895/96.
The houses were two-roomed. If you copy/paste/enlarge the photo, you can see they are small cottages.
As for the name, Ferris, you may well be right that its after a person. I wondered if it had a connection with iron.
The 1891 census shows the walk of the enumerator in this area. Those cottages are exactly where I would expect them to be.