YOU SAID:
He is a man of great tree and knowledge.
INTO JAPANESE
彼は素晴らしい木と知識のある人です。
BACK INTO ENGLISH
He is a wonderful tree and a knowledgeable person.
INTO JAPANESE
彼は素晴らしい木であり、知識のある人です。
BACK INTO ENGLISH
He is a wonderful tree and a knowledgeable person.
That didn't even make that much sense in English.