Nothing in the name apart from few things. Torah, Bible do not exist in real form today. What we know today has been lost in translation and interpretations etc. But still there are hints in those books. You check how God was called upon in Bible. Check Mark 15:34 and
Mathew 27:46 and see if it sound more like Allah, God, Jah or whatever you
may want to call him.
Then there are other aspects. For God you can have plural as gods, and feminine as goddess whereas you can have anything like that when it comes to Allah and that also proves that God is only one and even the name used cannot be pluralised etc.
Finally it is not about name. It is what and how you believe about God.
As for the beginning of you question. As a Muslim it is compulsory to believe in Torah, Bible and all of the books revealed to prophets from Adam (pbuh) to Muhammad(pbuh) By name four books have been mentioned in Quran. Few people call Quran being plagiarised from previous books. Muslim do not agree with that but believe that there are common messages due to the common source. However previous books were for the people for the time being and therefore have been corrupted and even huge number of Christian and Jew scholars agree with that and that is the reason they have been revised so many times.