A male given name of historical usage

a name (word or phrase indicating a particular person, place, class, or thing) / (more specifically) a given name (excluding the surname)

historic, historical / already-happened, past / former, old, traditional

A male given name of historical usage

a fountainhead (source of a river) / a source, origin

history / the study of history

"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).

a surname, especially those who are descendants of Emperor Saga

a source, origin

fountainhead / source, origin / Short for 源氏 (Genji): Minamoto clan