Where does “Петропавловск” come from?

Петропавловск (Russian) comes from Russian Па́вел, from Old Church Slavonic Павьлъ, from Ancient Greek Παῦλος, from Latin paulus, from Latin paullus.

Петропавловск (Russian): Petropavlovsk, the name of several inhabited localities in Russia

Definitions

Петропавловск traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Russian	Па́вел	Paul
2	Old Church Slavonic	Павьлъ	—
3	Ancient Greek	Παῦλος	Paul, a common Roman name, famously held by Paul, the Christian apostle
4	Latin	paulus	little, small
5	Latin	paullus	—

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