James VI and I was a ruler.
 After the Union of the Crowns, he based himself in England (the largest of the three realms) from 1603, returning to Scotland only once, in 1617, and styled himself "King of Great Britain and Ireland"
 On 20 October 1604, James issued a proclamation at Westminster changing his style to "King of Great Brittaine, France and Ireland, Defender of the Faith, &c

