Hi DannyG,
It's not a bad name. Sometimes the character's name is very important because you're creating a brand. Think Indiana Jones, Ferris Bueller (if you want to think "teen"), or even Batman. Lol. I think it's important and special that Batman's name is Batman. But there are some great movies that I don't even remember the names of the main characters, and it's not even important to me, but the movies and the characters are still some of my favorite movies and characters. For example, Sixteen Candles was a great movie, but who remembers that Molly Ringwald's character's name was Samantha Baker? And who remembers that John Cusack's character's name in Better Off Dead was Lane Myer? Okay, maybe a lot of people, but the character definition will help you decide if your character needs a flashy name or a plain-Jane name. (Those movies came to mind because you mentioned you were creating a teen character, and I was thinking about teen movies from the 80's.)
Lowden Dackwood is not bad at all. How did you come up with that name? To figure out if the name is a good name for your main character, I guess it would help to first decide if the character needs to have a creative, original and memorable name, or if the name is really insignificant to the story/script. If you want the character to have a great name, I guess it would help to take into consideration things like the character definition, setting, and genre. If I knew those things, I could probably give you a more detailed answer, but it sounds like a good name for now. Writing the character definition and knowing the main character inside and out before even starting an outline narrows a lot of things down. To start off with, when was he born? Where is he from? What's his ethnic background? Or maybe the name doesn't have to be a big deal at this point. You can always use symbols or initials and fill in the blank later.