The mushrooms are kicking in.
If you dream about a deceased friend coming back to life, it probably means that the friend is doing well and just wanted to check back in.
If this is a frightening dream, and the person coming after you is a threat, then it is a metaphor representing something you dread in real life. For example, the dream might refer to bills that are coming due that cannot be paid.
There is no patron saint for dreaming about a deceased son.
This dream seems to be a message of comfort and reassurance. In your subconscious mind, there seems to be an awareness that your grandmother is not entirely absent but continues to bless you with her spiritual care.
This dream suggests that something is coming to an end or to closure in your life. The situation might be somehow related to the deceased, such as a settlement in an estate that has been drawn out for years. Alternatively, the situation drawing to a close might merely resemble a similar situation you experienced with the deceased.
Because he was on your mind.
It means you are thinking about him
The dream suggests that some aspect of your life is coming to an end. Your mind may associate this area of your life with the deceased person. The dream is not predicting any actual death, but represents the end of one phase and the beginning of something new in your life.
This could mean that something you have recently encountered has triggered the memory of the deceased, and the memory was then expressed in your dream. It may also be that there is some situation in your real life where you need some knowledge or experience associated with this particular deceased person.
Much of the meaning of this dream depends on the identity of the deceased. If the funeral is for a celebrity, the dream suggests an end to whatever the celebrity is associated with, whether music, politics, sports, etc. If the dream gives no clue about the deceased, then the dream suggests that some part of the dreamer's self has been lost or is in danger of being lost.
The question is somewhat unclear. If the dream involves an actual baby seen with its deceased grandfather, it probably expresses the dreamers belief that the grandfather would be delighted and proud of the grandchild.
Intense fear of all dead persons is a common component of many cultures, so a dream such as this is not unusual. The deceased person in the dream does not represent the loved one as much as it represents the fear of death and the evil associations surrounding death.