I feel sure that you will get some assistance here.
You need to give as much information as you have about the family.
At least give a best guess if you do not know the exact places and dates.
When and where your father and grandfather were born. Your mother's maiden name.Where she was born.Where they married. Your grandmother's name and date of birth. Any other hints of the names of aunts and uncles. Any other clues that might help in a search.