Adam

The name Adam is believed to mean "created from red clay", as it comes from the words earth (אדמה) and red (אדום). It can be added that according to the book of Genesis, God created Adam from the "dust of the earth", which only confirms this version.

Minor nitpick here, but it's the "tree of the knowledge of good and evil" and not just "knowledge". [noted -ed]

I like the name because I have the name Adam. It also means man has awakened! :)

In Greek language, ΑΔΑΜΑΣ means:diamond.
In Hebrew: ADAMAH means earth. And God created Adam from the earth. Eventually out of "expensive" soil. Are these words related? Who knows?

The name Adam is older than many of the languages you have mentioned therefore it cannot be origin to these languages (Russian, German, Polish, English, etc.) My research for the name Adam had led me to the Muslim Holy Book "Quran" where the name "Adam" has been mentioned several times. From the Arabic language the name "ÂÏã" "Adam" is spelled and pronounced as in the modern English language today. It was given to the first God created-man. Therefore since the Arabic language is much older than many spoken languages today plus it belongs to the ancient language group of Assyrian and Hebrew, I believe it's worth it to mention it on your web site.

It doesn't say in the Bible that Adam was his name. Adam means "man" and that's what the Bible said. God created a man, but never gave him any name. And then it has become Adam.

Interestingly, the Hebrew word for human being is 'ben-adam', meaning 'the son of Adam'.