Hi Pat,
I've just found your query, I don't check the site as often as I should...
I have found the following references to John Nunn, miller, which you might find useful, and make help you locate the parish you need to check for your relatives birth details. Here goes...
John Nunn, Ricklinghall Inferior 1829
John Nunn, Finningham 1800
John Nunn, Botesdale 1823
John Nunn, Ipswich 1855, 58
John Nunn sen, Wenhaston (millwright) 1858, 64
J. Nunn, Ilketshall Saint Lawrence 1864
John Nunn, Fornham Saint Martin 1900
John Bidwell Nunn, Claydon 1815
Hope this helps.
Windy Miller
PS any info you glean on your millers I really like to add to my database, if you don't mind passing it on.