Go for it! I have two cousins that have little boys with the same name born very close together. One was always going to have it, the other picked it without knowing and just loved it. We all don't see each other often so it's not strange - if anything the family will talk about them in the terms of Beth's Cooper or Soph's Cooper if anyone is confused. It's also helpful for our elderly gramdma who has a terrible time remembering our names at the best of times

My sister has a daughter called Maddison and I see her everyday but I also have the name Addison on my list if we ever have another. I just love the name and my sister is fine with it.