Seishirou as a Baby Name. Meaning and Origin of Seishirou

What is the meaning of the name Seishirou ?

The baby name Seishirou is a Male name , 3 syllables long and is pronounced Japanese IPA: [se.iɕiɾoː]; common English approximation: SAY-shee-roh.

Seishirou is Japanese in Origin.

A Japanese masculine name, Seishirou (せいしろう; say-shee-roh), pairs Sei - often written as 清 “pure,” 誠 “sincere,” 聖 “sacred,” 政 “govern,” 征 “campaign,” or 星 “star” - with Shirō, typically 四郎 “fourth son” or 史郎/志郎 “history/aspiration + son” (郎 meaning “young man”). Common spellings include 清四郎, 誠四郎, 征四郎, and 星史郎; the chosen characters shape nuance from moral integrity or statecraft to celestial imagery or martial resolve.

Names ending in -rō flourished from the Edo to early Shōwa eras, when birth-order markers were popular in samurai and townsman families; today Seishirou feels classic yet polished. Noted bearers include army general Itagaki Seishirō and jujutsu innovator Seishiro Okazaki, while fiction offers CLAMP’s Sakurazuka Seishirō. Romanization varies - Seishirō (macron), Seishiro, or Seishirou - and informal short forms include Sei and Shiro.

⚙ Seishirou is exceptionally rare. There are only 2 recorded uses on record, spread over 2 countries.