Where does “サウジアラビア王国” come from?

サウジアラビア王国 (Japanese) comes from Japanese 王国, from Middle Chinese 王國.

Ancestry of “サウジアラビア王国”, step by step

サウジアラビア王国 traces back through two separate lines of ancestry.

via Japanese 王国

StepLanguageWordMeaning
1Japanese王国kingdom
2Middle Chinese王國

via Japanese サウジアラビア

StepLanguageWordMeaning
1Japaneseサウジアラビア
Every word from Middle Chinese 王國Every word from Japanese 王国
サウジアラビア王国 — Etymology, Origin & Word History | Etymology Explorer