Where does “Tiocu” come from?

Tiocu (Romanian) comes from Hungarian tök, from Proto-Slavic tyky — pumpkin, gourd.

Ancestry of “Tiocu”, step by step

Step	Language	Word	Meaning
1	Hungarian	tök	squash, pumpkin, vegetable marrow; bells;...
2	Proto-Slavic	tyky	pumpkin, gourd