Assuming the question refers to the Hebrew language which is sometimes called Jewish, the Jewish name for God is spelled the exact same way as it is in Hebrew. The letters (transliterated into English) are: yud, hei, vav, hei.
Other names for God in Yiddish are Eibishter, Hashem, Got (as in German), and Adoshem.
No. God is the Jewish God.
Jewish people only have one God. And the Jewish view is that God is always present everywhere, not just at weddings.
The Jews. (Though strictly speaking, Jews do not believe that God is Jewish or that God has any religion.)
Hanukkah, the Jewish Holiday.
Jewish people serve God. They do this by following the ethics of their religion.
Ketubah
Chai.
Long ago, God and the Jewish people entered a covenant together, meaning a mutual agreement. God had sworn to protect the Jewish, as long as they obeyed and respected him.
Hanukkah is not a religion. It is a Jewish Holiday. Jewish people worship one God.
The Jewish leaders that interpret God's will are called Mashiach.
If you are speaking of the Jewish Right of Return, it is "Aliyah".
To people of the Jewish faith, certainly. This is a question of faith and naturally those who have faith in God as described by Jewish teachings will claim Him to be True. Those who do not have faith in this God or have faith in a different god or gods will claim Him to be False. Only you can decide which is true.