Well, he is mentioned on a brass plaque in the church at Purley Magna. He is listed in every list of Nicolas and Elizabeth's children.
It may be that after Matthias and James were born, his first wife died and he ended up going to Ireland with his bother, Oliver. He later married Suzanna (maybe an Irish colleen?)Nd they had the twins.
This is, of course, fiction unless there is more corroborating evidence in Dublin. But we won't find it unless we look for it. My great-grandson was in Ireland a couple of years ago. If he goes back I will ask him to look around.