Shazam Wil-Wheaton Dowden-Patel is the offspring of Mike Dowden and Tamara Patel. He was born in November 2007. Mike thought his middle name was supposed to be "Joss-Whedon", but Tamara chose "Wil-Wheaton," to Mike's consternation. The hyphens are the source of his powers.
His first appearance was in "Mike's Kid" pt 2, Sep. 23, 2006. Davan and PeeJee both react very strongly to his appearance, which is presented as horrifically ugly. Afterward Shazam's face is never directly seen, until "Old Familiar Faces XI pt 1" in 2012. He seems to be friendly (albeit reluctantly) with the reincarnated Silas.