Where does “常磐” come from?

常磐 (Japanese) comes from Japanese 岩, from Old Japanese いわ.

常磐 (Japanese): a rock that does not change over time

Definitions

  1. a rock that does not change over time

Ancestry of “常磐”, step by step

常磐 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japaneserock
2Old Japaneseいわ

via Japanese

StepLanguageWordMeaning
1Japanesealways, constantly, consistently; a traditional...
2Old Japaneseとこ
Every word from Old Japanese いわEvery word from Japanese
常磐 — Etymology, Origin & Word History | Etymology Explorer