Koshiro as a Baby Name. Meaning and Origin of Koshiro

What is the meaning of the name Koshiro ?

The baby name Koshiro is a Male name and is pronounced ko-shi-ro (IPA: /koɕiɾo/).

Koshiro is Japanese in Origin.

Koshiro (Kōshirō) is a Japanese masculine given name, pronounced KOH-shee-roh. Its meaning depends on the kanji: common forms include 幸四郎 “happiness + fourth son,” 光四郎 “light + fourth son,” 康士郎 “health + gentleman’s son,” and 晃司郎 “bright + rule + son.” The -shirō/-rō ending comes from historical male suffixes meaning “fourth son” (四郎) or simply “man/son” (郎/朗). The initial Kō- may be written with characters such as 幸 (good fortune), 光 (light), 航 (voyage), or 孝 (filial piety). Romanized variants include Kōshirō, Koushirou, Koushiro, Koshirō, and Koshiro; nicknames Kōshi and Shirō appear.

Use is documented since the Edo period, when number-based boy names were fashionable. A renowned line of kabuki actors bears the stage name Matsumoto Kōshirō (松本幸四郎), giving the name cultural prestige. In contemporary Japan it reads classic rather than trendy, with a mild retro revival of -rō names; abroad, macron-less Koshiro is most common.

⚙ Koshiro is far from common. We have only 36 recorded uses of it on record, from 10 countries.