Sherie Acheson Lehman - Are there two different John Atchisons

I have found online notations that there was a John Atchison b.1710 in Ireland, and now I've located a John Atchison b. 1710 baptised in Allendale, Northumberland, UK. Are there more than one John Atchison b.1710 and if so, which one is noted to have relocated to Pennsylvania. Any information or guidance on where to confirm research would be greatly appreciated. Also believe John Atchison b. 1710 in Allendale's father is also a John Atchison b. 1682 baptised in Holy Island, Northumberland UK.