birthday boy/girl (...or newborn, if you really want to get technical) == ==
You call them your(or a) contemporary.
a birthday present is a symbol of celebrating the natal day of the person having the birthday
The person having the birthday!
ebay
Host
birth buddy
A person celebrating a Quinceañera is called a Quinceañera, which refers to both the celebration and the person being honored. It is a traditional Latin American celebration marking a girl's transition to womanhood on her 15th birthday.
A Loner.
Yes, you should call and thank the person for your birthday gift as it shows you appreciate the effort they made for you.
No; typically a relative or good friend of the person having the birthday hosts the party and supplies the birthday cake.
a poor person maybe......