| Name | Duncan Haldane OSTREHAN |
| Rank/Number | Lieutenant |
| Regiment/Unit | The Loyal North Lancashire Regiment / 4th Battalion |
| Enlisted | |
| Age/Date of death | 26 / 31 Jul 1917 |
| How died/Theatre of war | Killed in action / France & Flanders |
| Residence at death | |
| Cemetery | Ypres (Menin Gate) Memorial, Ieper, Belgium |
| Grave Reference | Panel 41 & 43 |
| Location of memorial | Thame Lord Williams's Grammar School |
| Date/Place of birth | 11 Mar 1891 / Aylesbury |
| Date/Place of baptism | 12 May 1891 Aylesbury |
| Occupation of Casualty | 1911: student of agriculture |
| Parents/Occupation | John Elliott Duncan & Alice Rebecca Ostrehan / Bank manager |
| Parents' Address | Westway, West End Ave, Pinner, Middx |
| Wife | |
| Wife's Address | |
| Notes | 1911: student at Agricultural College, Aspatria, Cumberland. Parents formerly of 2 Milton Villas, Aylesbury. Father born in India |