Mohammad who is an instance of the name of God, being one the beautiful names that belongs to God, like Samuel (name means name of God), not only knew God, but is the means and way to God like Jesus.
And the theme of Yahweh is there in Quran but I don't have time to explain everything and am not meant to. Rather you are to seek the family of the reminder to compliment your study of the Quran. And don't put terms of ignorance nor limitations to texts.
And woe to those who take the name of God for themselves like the generations leading to Noah, with no proof from God of their moral leadership nor proof they have deep or accurate knowledge of the book nor being representatives of the Prophet.
Will you seek other then God and his guidance for guidance, will you center your attention to teachers to teach you what his appointed teachers taught or will you forsake impure streams for those rivers of life that are reliable means of enlightenment and center your attention to those who God meant you to rely on as Authorities and reliable means of knowledge.