Where does “Hosseini” come from?

Hosseini (English) comes from Persian حسینی, from Persian ـی, from Middle Persian -yk', from Old Persian -𐎡𐎣, from Proto-Indo-Iranian -kas, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “Hosseini”, step by step

StepLanguageWordMeaning
1Persianحسینی—
2PersianـیForms nouns or adjectives from nouns; Forms...
3Middle Persian-yk'—
4Old Persian-𐎡𐎣of, pertaining to, belonging to, related to
5Proto-Indo-Iranian-kasCreates deadjectival and desubstantival...
6Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European -ḱos →Every word from Middle Persian -yk' →Every word from Persian ـی →