Londoner
/ˈlʌndənər/
Definition 1 of 1
Pro Tip 1/3Cultural Identity
Refers to someone's cultural ties to London, indicating a shared London culture and experiences. 
As a Londoner, he misses the traditional Sunday roast from back home.
Pro Tip 2/3Locational Pride
Emphasizes a person's pride in being from London, often linked to the city’s history or landmarks. 
She's a proud Londoner who loves showing visitors around the Tower of London.
Pro Tip 3/3Not Just Birth
Can also apply to someone who has moved to London and identifies with the city, not only natives. 
He's been living there for 20 years and is as much a Londoner as anyone born there.