Where does “Grigorescu” come from?

Grigorescu (French) comes from Romanian Grigorescu, from Romanian -escu, from Romanian -esc, from Latin -ēscō, from Proto-Italic *-ēskō.

Ancestry of “Grigorescu”, step by step

StepLanguageWordMeaning
1RomanianGrigorescu
2Romanian-escusuffix forming many Romanian surnames, e.g....
3Romanian-esc-esque, -ish; Used with a stem to form the...
4Latin-ēscōAttaches to a stem (a noun or adjective) to form a verb meaning “to become [stem]” or similar
5Proto-Italic*-ēskō
Every word from Proto-Italic *-ēskōEvery word from Romanian -escuEvery word from Latin -ēscō