It appears that your wife is a distant cousin of my husband.
The information you have, did that come from Paul de Redder Doris Howie or Anna Kettle?
Last year I sent a copy of the documents which I have written about the de Redder/De redder/ de Ridder family to each of them.
All De Redders in England appear to descend from Fradrik and his son William.
I have not had time to pursue the Dutch records any further for Fradrik(Frederick) possibly born in about mid 1790s.
Very interested in corresponding.
Barb de Ridder, NZ.