Where does “Șișeștean” come from?

Șișeștean (Romanian) comes from Romanian Șișești, from Romanian -ești, from Latin -ēscō, from Proto-Italic *-ēskō.

Ancestry of “Șișeștean”, step by step

StepLanguageWordMeaning
1RomanianȘișești—
2Romanian-eștiplural of -esc; Used with a stem to form the...
3Latin-ēscōAttaches to a stem (a noun or adjective) to form a verb meaning “to become [stem]” or similar
4Proto-Italic*-ēskō—
Every word from Proto-Italic *-ēskō →Every word from Romanian -ești →Every word from Latin -ēscō →