Is Gaines a Welsh name?

Excuse me, could you clarify something for me? I came across the name "Gaines" and I'm wondering if it's a Welsh name. I've seen it a few times and it has an interesting sound to it, but I'm not sure of its origin. Could you tell me if "Gaines" is indeed a Welsh surname, or does it perhaps have roots in another culture or region? I'm quite curious to know the history behind it.