太郎

Etymology
Appears to be a coinage within Japanese from -derived elements, as a compound of.

Initially used as a given name for an eldest son.

Attested since at least the early 900s.

Proper noun

 * 1)   the first, the biggest, the tallest, the most, the best
 * 1)   the first, the biggest, the tallest, the most, the best

Usage notes
Used as a generic or stereotypical male name, like.

The sense is used as if it were a name. This is often found used in combinations as a kind of euphemism, such as referring to the as, essentially describing the Tone River as the "eldest son" (i.e. foremost, biggest) of the rivers in the Bandō region.

Noun

 * 1)  generic protagonist of isekai-kei and social-network games
 * 2)   a fool, an idiot
 * 3)   a country bumpkin, a mark