l have a Shadrack Newnham b. 1832 Ringmer Sussex uk, son of Shadrack, b.1794 to John and Elizabeth nee Shadrack or Shaderick. l also have found Shadrack Newnham, born 1817 son of John Mewnham, b. 1782, son of John and Elizabeth above, and Sarah, maiden name unknown. Allowing for variations on the surname this combination of names is too much to be a coincidence. There is only one Shadrack Newnham on the entire 1881 uk census. l checked all this direct on the parish registers. Do you know when your Newingham ancestors left uk?