Uncommon boy names

Alicia
My husband and I are having a hard time coming up with names we like for our boy #2. So don't want a name that is so common that he'll have 20 other kids in his class with the same name but we don't like names that are so unique that you have to explain them to everyone. We have a Lincoln and we love his name. Anyone have any ideas?? 
Edit to add that our last name is Flanders so we don't want a name that ends in "er" as we don't like the sound of the two together.