If I knew Mike's (just an example) father is dead and Mike himself is dead already and suppose I don't know the name of his father. Which of the following form of question is more grammatically correct in English in the context mentioned above if I were to ask the name of his father for historical purposes (assume Mike was a very important figure):
1) Who was the father of Mike?
2) Who is the father of Mike?
When abbreviated both can be "Who's the father of Mike?", is this right?