Where does “Пульхерия” come from?

Пульхерия (Russian) comes from Ancient Greek Πουλχερία, from Latin pulcher, from Latin polcher.

Ancestry of “Пульхерия”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Πουλχερία	—
2	Latin	pulcher	beautiful, fair, pretty; noble, honorable,...
3	Latin	polcher	—

Пульхерия — Etymology, Origin & Word History | Etymology Explorer