I am sorry for your loss, but I was completely without knowledge of any information regarding your personal life. May the Lord bless you during this difficult time.
When I read what you wrote I burst into tears because it hit me that I could never call him anything again. In answer to your question. When I was a little girl, I called him "Daddy." When I grew up, I always called him "Dad." If he were here today, I'd gladly call him anything. I'm sorry.