Finish pattern
George John Thomas John
Are you sure the fourth term isn't James?
http://en.wikipedia.org/wiki/List_of_Presidents_of_the_United_States
There is no pattern, unless you claim that every even numbered person is named John.
George, John, Thomas, John, George
To finish the pattern "George John Thomas John," it appears that the sequence alternates between two names: "George" and "John." To continue the pattern, you can add another name after "John."
One possible continuation of the pattern could be:
George John Thomas John Robert
Or, if you wanted to repeat the names, you could continue the pattern like this:
George John Thomas John George
Overall, the pattern seems to involve alternating between the names "George" and "John," so you have the flexibility to add any other names you prefer while maintaining that alternating sequence.