A person from ... is called ...

Mancunian

noun 

/mæŋˈkjuː.ni.ən/ [C]

Definition

a person from Manchester, a city in the north of England

Mancunian adjective 

Scouse

noun (PERSON) 

/skaʊs/ UK informal

Definition

[C] (also Scouser) a person who comes from the Liverpool area, in north-west England

Liverpudlian

noun 

/ˌliv.əˈpʌd.li.ən//-ɚ-/ [C]

Definition

a person from Liverpool, a city in northwest England

Liverpudlian adjective 

a Liverpudlian accent
Glaswegian

noun 

/glæzˈwiː.dʒən/ [C]

Definition

a person from Glasgow, the largest city in Scotland

Glaswegian adjective 

Steven has a Glaswegian accent.

Geordie

noun 

/ˈdʒɔː.di//ˈdʒɔːr-/

Definition

•

[C] someone who comes from Tyneside in Northeast England

•

[U] the type of English spoken by someone from Tyneside

a Geordie accent

For more, go to: http://en.wikipedia.org/wiki/List_of_adjectival_forms_of_place_names