Letting older sibling name the baby.

What do you ladies think of this? I remember when my son was around 2, I mentioned the idea of naming a future son Logan because our first child's name is Landen and I thought they went good together. It was never a serious, thought just an idea. I'm now pregnant again and it's another boy. Our son Landen is now 5 and suggested we name the baby Logan. He never heard us talk about that name, he thought it up on his own and is dead set on it. He literally tells everyone that that is what the baby's name is and won't accept anything else. I don't hate the name and my husband and I can't really agree on anything else. There are a few others we like but we feel like we should just go with Logan to make our older son happy and be a part of this and because it is something we do like. What would you all do in the situation if there weren't any other serious choices in mind?