turun is the singular genitive or singular genitive of Turku.

TurkuN

Norwegian Bokmål

ÅboN

Kven – Norwegian Bokmåldict-fkv-nob/src/Prop_fkvnob.xml:1769Edit on GitHub Suggest

Case	Sg
Nom	Turku / turku
Gen	Turun / turun
Par	Turkkuu / Turkua / turkkuu / turkua
Ill	Turkhuun / turkhuun
Ine	Turussa / turussa
Ela	Turusta / turusta