Why is the Queens husband not a king?

Related questions

1. Will the royal baby be a US citizen?
2. What is the net worth of Prince Charles?
3. Will Meghan Markle still be a US citizen?
4. Who lives at Frogmore House?
5. Why is Prince Henry called Harry?
6. What happens when the Queen Elizabeth dies?
7. What is the band Queen's net worth?
8. Will the royal baby have dual citizenship?
9. What is a lord's daughter called?
10. Where is Harry in line for the throne?

Tags

1. #george
2. #britain
3. #became
4. #female
5. #edinburgh
6. #married
7. #queen
8. #become
9. #necessarily
10. #elizabeth
11. #ruler
12. #however
13. #called
14. #husband