Where does “Դնեպրոպետրովսկ” come from?

Դնեպրոպետրովսկ (Armenian) comes from Russian Днепропетровск, from Russian петровский, from Russian Пётр, from Koine Greek Πέτρος, from Ancient Greek Πέτρος, from Ancient Greek πέτρος — rock, stone, boulder; type of reed.

Ancestry of “Դնեպրոպետրովսկ”, step by step

Step	Language	Word	Meaning
1	Russian	Днепропетровск	—
2	Russian	петровский	Peter, Peter's
3	Russian	Пётр	Peter; {{w\|Peter the Great}}
4	Koine Greek	Πέτρος	—
5	Ancient Greek	Πέτρος	Peter
6	Ancient Greek	πέτρος	rock, stone, boulder; type of reed

Every word from Ancient Greek πέτρος →Every word from Ancient Greek Πέτρος →Every word from Koine Greek Πέτρος →