ベツプタ
Ainu「川向ふ」
petputa?low
The related table already marks petputa? uncertain and has no historical explanation. Pet kus ta fits the across-river sense but diverges markedly from プタ. Pet put ta resembles the kana but would suggest a river-mouth location, not establish 川向ふ. Neither alternative warrants replacing the guess. The river-mouth sense of pet put ta occurs in ainu-times/015/5#8.
References
Occurrences (1)
- National Institute for Japanese Language and Linguistics · 乾巻 · Page 10, line 10 · ベツプタ
…石シユツシユツプ浜辺ピシタ浜端たシツテキシヤム ヲタシヤム川向ふベツプタ川の俣ベタヌ古川メム岡ヤ ヤタ丘陵ヤベカ川原ビタラ ツビラツカビウカ瀬ラツカ堀ヱチヤン ウヲリ …