Where does “Costinescu” come from?

Costinescu (Romanian) comes from Romanian Costin, from Latin Constantinus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “Costinescu”, step by step

StepLanguageWordMeaning
1RomanianCostin—
2LatinConstantinus—
3Latin-īnusof or pertaining to; -ine
4Proto-Italic-īnosof/belonging to
5Proto-Indo-European-iHnosCreates adjectives of materials
6Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →