Where does “Қустантиния” come from?

Қустантиния (Tajik) comes from Classical Persian قُسْطَنْطِینِیَّه, from Arabic الْقُسْطَنْطِينِيَّة, from Byzantine Greek Κωνσταντινούπολις, from Ancient Greek Κωνστᾰντῖνος, from Latin Constantinus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos — adjectival suffix.

Ancestry of “Қустантиния”, step by step

StepLanguageWordMeaning
1Classical Persianقُسْطَنْطِینِیَّه
2Arabicالْقُسْطَنْطِينِيَّة
3Byzantine GreekΚωνσταντινούπολιςConstantine’s city
4Ancient GreekΚωνστᾰντῖνοςof Constantine; Constantine's
5LatinConstantinus
6Latin-īnusof or pertaining to; -ine
7Proto-Italic-īnosof/belonging to
8Proto-Indo-European-iHnosCreates adjectives of materials
9Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no-