Seijin as a Baby Name. Meaning and Origin of Seijin

What is the meaning of the name Seijin ?

The baby name Seijin is a Male name , 2 syllables long and is pronounced Japanese: /seːdʑin/ — approx. 'SAY-jeen' (Sei-jin).

Seijin is Japanese in Origin.

Seijin is a rare Japanese given name, usually masculine, pronounced SAY-jeen. Its meaning depends on the kanji: possible combinations include 聖人 (“holy person; sage”), 誠仁 (“sincere benevolence”), 清仁 (“pure kindness”), 星仁 (“star + benevolence”), or 成仁 (“to become humane”). Because 聖人 also names an ideal “sage,” and 成人 means “adult,” the word seijin appears widely in Japanese culture, from classical texts to Seijin no Hi, the national Coming‑of‑Age Day, which gives the name a dignified, milestone aura.

As a personal name it has seen occasional modern use rather than long-standing popularity; it aligns with 20th‑century virtue-name trends (cf. Seiji). Variants and related forms include Seiji (distinct but close in sound), and the Korean given name Se‑jin/Sejin (서진/세진), which is unrelated etymologically but sometimes rendered without a hyphen as “Sejin/Seijin.”

⚙ Seijin barely registers. Across 4 countries, we found just 8 recorded uses of it.