I'd use it still. Will you really see them that often? Maybe now you will, but when your kids are 5, 10...?

The only time I'd maybe change it is if my sister (or BIL's, if that ever happens, c'mon guys!) used the same name. Cos we see each other quite a bit.
It's possible that I'd change it if the name was really uncommon too. But maybe not. It would depend how sold I was on it. If you LOVE the name, then stick with it I reckon.