Just my opinion, I think Emma Lemma Lou sounds like a designer name. I definitely get a feeling of whimsey from which goes well with baby items. But I still get a strong sense of high end designer too, and I think the other items would go well with it. That said, I think it could go equally well separating them. Opening a separate shop means twice as much work. Not just for making the items, but managing the shop, orders, and marketing. I think you would do fine keeping them together, but if you can't imagine it then open the second shop! Just keep in mind the amount of work you will need to put into it!