I think that you could use them I don't think it would matter. If you like the names and have special reasons to use them then you should.
btw, I know of this sib set:
AmyJamieJames
(The parents thought that they were only going to have the tow girls so they named the second one
Jamie after the dad, five years later they had
James who got the dads full name.)
So if you think its bad to have
Aimee and
Jamie, just think of them and dont feel SO bad!
Tate