I think I have worked out why the names were changed. Samuel F Waite was sent to prison, after March 1888. not on census for 1891,1901, released and died before 1911. Prison census records are not easy to find, not sure where they are. But it would be a reasonable explanation for why the childrens names changed on census, and they were told he was dead. could have got 25-30 years released on good behaviour? for what?!!!!!
I think the Samuel F Waite who died in 1910 is the one. Would have gone back to his old home area, hoping that no one there knew where he had been.