Conditions for the validity of Nikaah

Q: My sister's name is Aay Bee but during the nikaah ceremony the Mufti said "Aay Khan" instead of "Aay Bee". I just want to ask if this nikaah is valid or do we need to do the nikaah again?

Q: I have done a civil marriage with a non Muslim girl who will convert to Islam, but has not yet converted due to some financial problem. I have tried to get the nikaah registered but they are asking +/- 10,000 for registering and certificate. Now I have one child. Kindly assist on how to get the nikaah properly and how can I correct my mistakes.

Q: I want to marry a second wife, do I need permission from my first wife?

Q: In a nikah ceremony for a new Muslim couple, one male adult wakeel on behalf of bride and another male adult witness were present. Is the nikah for both valid. Later this nikah was register in a madressa with a mufti.

Q: Can you let me know in Islam if a nikaah is only valid if it is performed by an imam and if there are witnesses present? Or is the nikaah valid without being performed by an imam and without witnesses or can the couple perform nikaah themselves?

Q: Is it necessary for a man to seek permission or even to bring to the notice of his first wife about his second marriage? I know its after effects but I just want to know as per shariah if it is necessary or required?

Q: I am a Muslim but my boyfriend is Hindu. He is going to convert to Islam and then we will get married. My question is that after accepting Islam, he wants to keep his culture the way it was. For example, he wants to have a wedding according to the Hindu culture. Is it permissible for him to keep his Hindu culture?

Also, I am willing to turn vegetarian because he was brought up as a vegetarian. Is it permissible for me to do this?

Q: According to Islam, a Muslim girl cannot marry a Hindu because the Hindu man, being the head of the family would ask the girl to convert. But if the Hindu family does not ask for conversion, then is it alright for a Muslim girl to marry Hindu boy? What is the punishment of a haraam relationship?

Q: A girl is not a virgin and was married previously. This is her second marriage.

When talking about her marriage with mother, the girl said something that her mother understands that her daughter wants to marry. Her father then performed her nikaah without the daughter present. A few days after nikaah, the boy and girl engaged in sexual intercourse. Is this ok?

Q: Is it permissable for a Muslim girl to marry a Hindu boy?