Where does “Ursescu” come from?

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

Ancestry of “Ursescu”, step by step

Step	Language	Word	Meaning
1	Romanian	-escu	suffix forming many Romanian surnames, e.g....
2	Romanian	-esc	-esque, -ish; Used with a stem to form the...
3	Latin	-ēscō	Attaches to a stem (a noun or adjective) to form a verb meaning “to become [stem]” or similar
4	Proto-Italic	*-ēskō	—