(archaic) Alternative form of んとする (n to suru)

蛙: (archaic, possibly obsolete) a frog (amphibious animal)

逸話: anecdocte

if that's the case, in that case

a round coin with a square hole in the middle / (by extension) money / a 家紋 (“family crest”) with various designs of round coins

銭: a surname

age

Ka-ending dialect form of よい (yoi, “good”)

瀬戸:

(Internet slang) Clipping of ようつべ (Yōtsube, slang for YouTube).