What is the longest royal bloodline that is still continued through today?

Question

Like any royal pary from the royal servants,maids,dukes,knights, what is the longest bloodline that stille stretches till this day?

Answer 1

In contrast to the Japanese Imperial family, the British Royal family are Jane and Johnny come latelys--The Japanese Imperial bloodline dates back to the 6th century BCE, although rulers assumed the title of Tenno (Emperor) or Sumera-Mikoto (Heavenly Son) in the 6th or 7th century CE.  

Elizabeth II is a direct descendant of both Egbert, the King of Wessex (r. 829), and Alfred the Great  (CE 871-899) as well as William I, also known as "William the Conqueror", who, of course, invaded England in 1066.

Answer 2

Up until the Shah of Iran was overthrown, they had a very long line.  He could trace his line all the way back to Xerces.

Answer 3

Japan.  The Emperors of Japan.

Answer 4

Japan has the longest continuous royal line.

Answer 5

The Capetian dynasty (that includes any direct descendant of Hugh Capet of France) is the oldest continuously ruling monarchial dynasty in Europe – it originates in 987 and is the current ruling house of Spain and Luxembourg.