À-gû-san亞虞山

either of the provinces of Agusan del Norte

either of the provinces of Agusan del Norte or Agusan del Sur; Agusan River and/or the area across its drainage basin

historical

English Wiktionary, “亞虞山” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E4%BA%9E%E8%99%9E%E5%B1%B1 · confidence: Medium (Wiktionary PH)