Voldemort himself is a Half-Blood, so instead of going to Pure-Blooded Neville, he went to Harry instead. Also, Voldemort had more respect for pure-blooded wizards, so would want to kill a half-blood instead of a pure-blood. He might not have known of Neville's existence, but if he did, it is said that he "went to the one he considered a greater threat".
- The idea of Harry stronger than Neville (at that time) is wrong. They were just babies!
- However, Harry could have been considered a greater threat as his parents could have been considered to be the most powerful of the two wizarding families, The Potters over the Longbottoms.