When was king arthur born?

Question

King, Arthur

Answer 1

Notice that King Arthur is a legend, not a real person who once lived.  There are rumors, with shaky-at-best evidence, that the legend might have been based on a real person, and one of the most popular of those is that he would have been an English noble who would have lived sometime between the late 5th century and the early 6th century of the Christian Era.

But in general lines, King Arthur was never "born", because he was never a real person.

Answer 2

Another King Arthur question?

Answer 3

Possibly around c. 6th century A.D.