Where does “Петрівна” come from?

Петрівна (Ukrainian) comes from Ukrainian Петро, from Koine Greek Πέτρος, from Ancient Greek Πέτρος, from Ancient Greek πέτρος — rock, stone, boulder; type of reed.

Ancestry of “Петрівна”, step by step

Step	Language	Word	Meaning
1	Ukrainian	Петро	Peter, one of the twelve apostles
2	Koine Greek	Πέτρος	—
3	Ancient Greek	Πέτρος	Peter
4	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 →