William Day to Elena De Ybanondo - 1911 Census household returns
- William Day to William Day
- William Day to William Day
- William Day to William Day
- William Day to William Alexander Day
- William Alexander Day to William Edwin Day
- William Ernest Day to William Henry Day
- William Henry Day to William J Cleaver Day
- William Jackman Day to William Joseph Day
- William Joseph Day to William Thomas Day
- William Thomas Day to Elizabeth E Daybell
- Ernest Daybell to William Daye
- William Daye to Alfred Daykin
- Alfred Daykin to George Daykin
- George Frank Daykin to John Daykin
- John Daykin to Nanny Daykin
- Percy Daykin to William Daykin
- William Daykin to Edward Dayman
- Edward Dayman to William Thos Dayman
- E J Daymard to Joe Daymond
- John Daymond to Arthur Henry Daynes
- Benjamin Daynes to John William Crook Daynes
- Joseph Daynes to William Daynes
- William Daynes to Dora Daysh
- Edmond Daysh to John William Dayson
- Louisa Dayson to Joseph Dayus
- Joseph Dayus to Juan De Alberti
- Saturnino De Aldecocea to H De Barr
- Henry De Barr to Albert De Belle
- Emanuel De Belle to Ann Eliza De Boise
- John De Boise to Henry Benjamin De Brent
- Mortimer John De Brent to William George De Burgh
- Helene De Burgh Lewis to Woolf De Carte
- Elizabeth De Cartent to James A De Castro
- John Paul De Castro to Vicente Fernandez De Co Rdoba
- Albert Fairfox De Cobain to Richard De Courcy
- Saidie De Courcy to Adolphe De Faye
- Ann I De Faye to Frank De Fraine
- George De Fraine to George A De Garis
- George Augustus De Garis to William De Graag
- Mary Ann Garnet De Grachy to Ann De Gruchy
- Ann De Gruchy to Philip D De Gruchy
- Philip Durell De Gruchy to Dinah De Haas
- Emmanuel De Haas to Hannah De Jabet
- Hubert Caliste De Jacobi Da Vallon to Ernest Fletcher De Jong
- Felix De Jong to Yvonne Huchet Vicomte De La Bedoyere
- Louisa De La Belinaye to Mary De La Fosse
- Sarah L De La Fosse to J De La Haze
- Bertha De La Hey to John De La Mare
- John De La Mare to Ethel De La Perrelle
- Herbert Alfred De La Perrelle to Kathleen De La Ville
- Cyril Roylance De La Wyche to Charles De Lancy
- Louisa De Lancy to Edward Joseph De Lautour
- Alphonte Jules De Lauwer to Josephine Katherine M De Lisle
- Leon William De Lisle to Edmond Menard De Luzy
- Ellen Maud De Luzy to Esther De Matose
- George De Matose to Leopold De Michele
- Mary Ann B De Michele to Nicholas De Mouilpied
- Thomas De Mouilpied to Henry De Nottbeck
- Blanche De Nujae to Marie De Perroth Also Sleigh
- Henri Boursier De Perthe to Percy De Prez
- William Leonard De Prez to Louis De Revers
- Marion De Reyes to Herbert Edward De Rongemont
- Cahrle De Roode to Arthur De Salis
- Augusta De Salis to Catherine De Serton
- Edward Henry De Sevante to Louis Francis Xavier De St Aubin
- Francis De St Croise to Victor De Steiger
- Baroness De Stein to Frederick George De Val
- James De Val to Charles Aubrey De Vere White
- Susana Burnham De Vergara to Joseph Victor De Ville
- Kate De Ville to Leopolden De Vos
- Albert De Voy to Julia De Wilden
- Wilfred Vercker De Wille to Elena De Ybanondo