John Duerden to Joseph Duggan - 1911 Census household returns
- John Duerden to Robert Duerden
- Robert Duerden to William Duerden
- William Duerden to John Tallentire Duers
- Joseph Duers to Charles John Dufall
- Charlotte Dufall to Arthur Duff
- Arthur W Duff to Eliza Duff
- Eliza Duff to Gidien Duff
- Gilbert Duff to Jane Duff
- Jane Ann Duff to Joseph Duff
- Joseph Arthur Duff to Robert Duff
- Robert Duff to William Duff
- William Duff to Arthur William Duffell
- Augusta Samuel Duffell to John Duffell
- John Albert Duffell to Alice Duffett
- Ann Duffett to Rosina Duffett
- Samuel Duffett to James Duffey
- James Duffey to William Duffey
- Edward Dufffy to Alice Duffield
- Alice Duffield to Charles Duffield
- Charles Duffield to Ellen Duffield
- Ellen Duffield to George Duffield
- George Duffield to Henry Duffield
- Henry Duffield to James Thomas Duffield
- Jane Duffield to Joseph Duffield
- Joseph Duffield to Robert Duffield
- Robert Duffield to Thomas Duffield
- Thomas Duffield to William Duffield
- William Duffield to Edgar Duffill
- Edward Duffill to Samuel Duffill
- Sarah Duffill to Betty Duffin
- Bramwell Howard Duffin to Frederick Joseph Duffin
- George Duffin to James Charles Duffin
- James George Duffin to Richard Duffin
- Richard Duffin to William Duffin
- William Duffin to John Duffton
- Andrew Duffty to Annie Duffy
- Annie Duffy to Cornelius Duffy
- Catherine Duffy to Ellen Duffy
- Ellen Duffy to Harry Duffy
- Helen Duffy to James Duffy
- James Duffy to James Duffy
- James Duffy to John Duffy
- John Duffy to John Duffy
- John Duffy to Joseph Duffy
- Joseph Duffy to Martin Duffy
- Martin Duffy to Michael Duffy
- Michael Duffy to Patrick Duffy
- Patrick Duffy to Peter Duffy
- Peter Duffy to Susannah Duffy
- Terance Duffy to Thomas Duffy
- Thomas Duffy to William H Duffy
- William Henry Duffy to Thomas Henry Dufour
- Walter George Dufour to Henry Dufton
- Henry C Dufton to Rufus Gilpin Dufton
- Ruth Dufton to Gertrude Eliza Dufty
- Harry Dufty to Edwin Dugan
- Edwin Dugan to Edward Dugard
- Edward J Dugard to Alexander Dugdale
- Alfred Dugdale to Edward Dugdale
- Edward Dugdale to Gertrude Dugdale
- Gertrude Dugdale to James Dugdale
- James Dugdale to John Dugdale
- John Dugdale to Margaret Dugdale
- Margaret Dugdale to Robert Dugdale
- Robert Dugdale to Thomas Dugdale
- Thomas Dugdale to William Dugdale
- William Dugdale to Annie Duggan
- Annie Duggan to Denis Duggan
- Dennis Duggan to Frederick John Duggan
- Fredrick Duggan to James Duggan
- James Duggan to John Duggan
- John Duggan to Joseph Duggan