The name Keegan or Declan for a possible third boy??

We have a Gavin and Liam and Love both Declan and Keegan for a third boy. The only down sides on the names are Declan can be mispronounced or made fun of being in a Klan and Keegan is being used for girls now too and I'd hate for him to be the only boy Keegan in his school. So please help us decide!