"Crown Prince" or "Crown Princess".
Heir apparent
The next person in line to the British Crown is Prince Charles' eldest son, Prince William, and William would the inherit the throne from Queen Elizabeth II.
The person voluntarily giving up the throne in favor of his son is abdicating the throne. This decision is often made to ensure a smooth transition of power and to allow the next generation to take over leadership responsibilities.
err.. They're not. The Queen's son, Prince Charles is the next to inherit the throne. Her grandsons (Charles's sons), William and Harry, are second and third in line.
Neither Elizabeth I or II were appointed. They ascended the throne because they were born to royalty and were in line to inherit the throne. Elizabeth I was the second child of Henry VII and third in line. When her brother Edward and sister Mary both died childless, Elizabeth inherited the throne. Elizabeth II was the oldest child and had no brothers so she was first in line to inherit the title when her father died.
If that person had legally adopted the daughter then she would be his legal heir. Otherwise the only way she could inherit his property would be by his will and she would not be considered as next of kin if he died intestate.
Heir apparent to the throne of the United Kingdom of Great Britain and Northern Ireland is titled Prince of Wales, currently His Royal Highness Prince Charles. He is Her Majesty's eldest son and will inherit the throne once Her Majesty passes or abdicates the throne by choice.
hades throne is made from skulls and in the shape of a throne in the under world next to his wife's throne
When a person dies without a will their property is distributed to the heirs-at-law according to the state laws of intestacy in the United States. You can check the laws for your state at the link provided below.
Next birth of a person
You haven't said which throne, but if you mean the British monarchy, next in line after Queen Elizabeth II is her son, Prince Charles, and next in line after Prince Charles is his oldest son, Prince William. There are a whole lot of more people in line, too, after them.
The king sits on his throne. Prince William is next in line for the English throne.
Princess Viktoria.