"I have nine names."
Translation:Ik heb negen namen.
Since you made it to level 9 and completed a good bit of the tree already I suppose you're a bit rusty.
Having a read through this should clear things up: https://www.duolingo.com/comment/3732817
And here's an overview of grammar related topics that may answer any other questions: https://www.duolingo.com/comment/3762671