I think you're called Master (As a male) before you get married. I'm not 100% sure but it's mine aswel.
Miss.
MIss
In letter heading you would properly address them as Master So and so.
Master
I think that Master is correct
Master John Doe
Do I address a 5 year old boy as Master when sending him a card.
13-14 years old and a knight at 21.
When addressing an envelope to a boy under 18, you can put Master in front of their name. There are many professions that have master in front of them. You can also address a teacher of certain things as master, especially in Asian arts.
"Señorita" is a Spanish term used to address or refer to a young unmarried woman or girl. If it is used for a boy, it would not have a specific meaning as it is not typically used to address males.
No. Master chief, has no relatives or known parents. He is abducted as a young boy to be trained and engineered into a Spartan. He doesn't even remember any siblings or relatives at all.