Many thanks for your comment - my Madgetts seem to go directly back to John Madgett who married Elizabeth Gibbon in Thrandeston 1779, but so far cannot link my Madgetts to the Diss dynasty!
I cannot fine his birth after many years of looking. I did find a family of Madgetts in Saxlingham Nethergate, which had Johns, but earlier there name is Matchett, but I am checking on these.
Thanks again
Tricia