君 in Chinese / Japanese...

君 is a common transliteration to Mandarin Chinese for the name June.

This sounds like “June” in Chinese but does not mean the month of June at all.

This is the second most common Mandarin Chinese transliteration for the male German name Günther or Gunther.

This means nobleman, person of noble character, man of virtue; wise man, or a true gentleman

君子 can be romanized as chün-tzu or jūnzǐ from Chinese and gunja from Korean. This has the same meaning in Japanese, but in another context, can be the female given name Kunshi.

大君 is the Japanese word Taikun. It's defined directly as liege, lord, or an alternate title for a shogunate.

The sound of this Japanese word entered the English lexicon by the 1800s but took the spelling of “tycoon.” Even President Lincoln was referred to as a Tycoon in the 1860s.

In Japan, this is still understood as “Great Lord” or “Big Boss.” In America, it means “Bill Gates” and “Warren Buffet.”

君子豹変す is a Japanese proverb that suggests that a wise man is willing to change his mind, but a fool will stubbornly never change his.

The first word is 君子 (kunshi), a man of virtue, a person of high rank, a wise man.

The second word is 豹変 (hyouhen), sudden change, complete change.

The last part, す (su), modifies the verb to a more humble form.

The “fool” part is merely implied or understood. So if wise and noble people are willing to change their minds, it automatically says that foolish people are unwilling to change.