This is the 16087th most frequent Turkish word.
vatandaşlığının
"Of his/her/its citizenship."
This refers to the possession or condition of being a legal member of Turkey as understood by the phrase 'Türk vatandaşlığının'.
Ali, Türk vatandaşlığının avantajlarını araştırıyor.
Ali is researching the advantages of Turkish citizenship.
'Vatandaşlığının' here refers to the legal and official aspect or status of the individual's citizenship.
Vatandaşlığının hukuki durumunu öğrenmek istiyor.
He wants to learn the legal status of his citizenship.
The usage of 'vatandaşlığının' pertains to the affiliation or belonging to the mother's nation of citizenship.