Loiner is a demonym, describing the citizens of Leeds.
The Rugby League club Leeds Rhinos were previously nicknamed the Loiners
While there are several theories, the actual origin of the term remains uncertain.
The three competing theories are:
Loiner could derive from the name Loidis (in use by the eighth century for the district around modern-day Leeds).
Another explanation says that in the 19th century there were many yards and closes around Briggate whose back entrances were known as Low Ins or Loins, hence Loiner.
A third theory is that, in the area of Briggate, locals referred to numerous nearby streets as 'loins' in the local accent, as a corruption of the word 'lanes'. People who gathered in these loins to gossip were therefore termed Loiners.
