Shinjirou as a Baby Name. Meaning and Origin of Shinjirou

What is the meaning of the name Shinjirou ?

The baby name Shinjirou is a Male name , 3 syllables long and is pronounced sheen-JEE-roh (IPA: [ɕindʑiɾoː]).

Shinjirou is Japanese in Origin.

Shinjirou is a Japanese masculine name, more commonly romanized Shinjirō or Shinjiro. It combines a shin- element with -jirō/-rō (“second son”/“young man”). Meaning depends on the chosen kanji: 信二郎 conveys “faithful second son,” 進次郎 suggests “advancing second son,” 真治郎 implies “true, well-governed/healed boy,” 新次郎 means “new, next son,” and 伸次郎 reads as “growing second son,” among other attestations.

Names ending in -rō and Jirō were favored from the late Edo through early Shōwa periods, reflecting birth‑order naming customs; the form remains familiar today, helped by public figures such as politician Shinjiro Koizumi (小泉進次郎), beverage magnate Shinjiro Torii (鳥井信治郎), and entertainer Shinjiro Atae (與真司郎). Variants and related names include Shinji and Jirō, with Latin‑letter spellings Shinjirou/Shinjiro/Shinjirō. Overall, the name evokes qualities like faith, truth, progress, growth, or renewal applied to a son.

⚙ Shinjirou is about as rare as a name gets. In all, it appears just 1 time, across 1 country.