Where does “oleandar” come from?

oleandar (Serbo-Croatian) comes from German Oleander, from French oléandre, from Medieval Latin oleandru.

Ancestry of “oleandar”, step by step

Step	Language	Word	Meaning
1	German	Oleander	oleander
2	French	oléandre	oleander
3	Medieval Latin	oleandru	—

oleandar — Etymology, Origin & Word History | Etymology Explorer