Where does “เประ” come from?

เประ (Thai) comes from Malay Perak, from Malay pirak, from Proto-Malayic pirak.

Ancestry of “เประ”, step by step

StepLanguageWordMeaning
1MalayPeraksilver metal
2MalaypirakObsolete form of perak
3Proto-Malayicpirak—
Every word from Proto-Malayic pirak →Every word from Malay pirak →Every word from Malay Perak →