Infant

Deen means in Arabic (religion). We don't have any of the Prophets or Infallible Imams who called themselves or any of their children in this name. You can add to it then use it like Emad al-Deen, Alauddin, Fakhruddin, Izzuddin, etc. That will make sense otherwise just Deen is not an Islamic name.

 Wassalam.

Yes it is permissible if the child still needs to be breastfed but it should not take long after two years.

Wassalam. 

Yes she can. There is no condition in Adhan and Iqaamah to be given by the father only or any man. Women including the mother can do it as well.

'Giving the name to the child should not ignore the father's wish.

'Wassalam.

Simply by 1. reciting Quranic verses like Ayatul Kursi and Suras like Sura al-Falaq and Sura Annaas. 2. Also by reciting Du'a and supplications for protection from harm. 3. It is also very useful to pay daily Sadaqa for protection from every harm. 4. No doubt, seeking the Waseela of Ahlul Bayt (AS) is always useful.

'Wassalam.

Children who die before reaching the age of Buloogh (Puberty) will be in the mercy of Allah and will never  suffer at all. They will be offered to enter Paradise but according to Hadeeths, they will prefer to wait for their parents to enter Paradise with them.

Children with special needs will have more bounties and more mercy in the hereafter for all the sufferings they had in this life.

Wassalam.

Yes if the breast feeding continues for whole day and whole night or it was 14 times continuously.

The woman then becomes breast feeding mother.أم رضاعية 

Wassalam.

No, it is not permissible for any one to cause distance or cut relations between relatives. It is a major sin which is mentioned in Quran with a curse from Allah on the person cuts relations with relatives.( Sura 47, verse 22 and 23). Even if her father in law is oppressive, he remains related to her child and depriving him from seeing his grand son is a major sin. The Prophet Muhammad (SAWA) did not stop his wife Um Habeebah from seeing her father Abu Sofyan who was one of worst enemies of the Prophet. He allowed her to receive her father in the house of the Prophet.

Wassalam.

It depends on the way of using the vaccine.

If such vaccine is to be taken orally, it will Haraam to consume it.

But if it is not taken orally but injected in the body or dropped in the nose with out letting it go inside the stomach, then it will be allowed.

Wassalam.

After completely removing the actual Najasat, the Najis couch or bed or item must be washed with water, one time with Kurr water (big quantity or current water) or three times with small quantity of water/

Wassalam.