Dan Garrett is the first Blue Beetle in the comics. Jaime Reyes is the successor of second Blue Beetle Ted Kord.
The suit of Jaime Reyes aka Blue Beetle is almost similar to iron man in functionality.
For a while, Jaime was even a member of the Teen Titans.
The blue scarab that gives the powers of Blue Beetle belongs to a alien race called Khaji Da.
The character of Jaime Reyes aka Blue Beetle is introduced in DC Comics in just 2006.