Tomonaga is both a masculine Japanese given name and a Japanese surname.
Written forms Tomonaga can be written using different combinations of kanji characters. Here are some examples:
友永, "friend, eternity" 友長, "friend, long/leader" 知永, "know, eternity" 知長, "know, long/leader" 智永, "intellect, eternity" 智長, "intellect, long/leader" 共永, "together, eternity" 共長, "together, long/leader" 朋永, "companion, eternity" 朋長, "companion, extend" 朝永, "morning/dynasty, eternity" 朝長, "morning/dynasty, long/leader"
The name can also be written in hiragana ともなが or katakana トモナガ.
Notable people with the given name Tomonaga , Japanese samurai
Notable people with the surname Tomonaga , Gorōbyōe Tomonaga, Japanese priest in the Dominican Order of the Catholic Church , Japanese modern pentathlete , Japanese physicist