Where does “Dumasca” come from?

Dumasca (Romanian) comes from Proto-Nguni -duma, from Proto-Bantu -dùma — to roar.

Ancestry of “Dumasca”, step by step

Step	Language	Word	Meaning
1	Proto-Nguni	-duma	to roar, to thunder; to be famous
2	Proto-Bantu	-dùma	to roar