When searching the Commonwealth War Graves Commission site I came across three names which I feel must be linked to the Bristol family.
Albert Dun died 8 Aug 1916 age 18 Son of Mrs Sarah Ann Dun 36 Foundry St., Warrington His brother Peter Stanley was also killed.
G.D. Dun died 30 Sept 1918 no further information Buried Arnos Vale cemetery Bristol Gave location FF.134
Leslie Finlay Dun died 28 Sep 1915 age 21 Son of Finlay and Annie Louise Dun of Hoylake, Cheshire.
Any information would be appreciated.
As I've mentioned before I strongly suspect that the Bristol family is, through Robert Dun, part of the Aberdeen family - When time permits I'll add more material on this fascinating family.
1901 Census
John Dun & Charlotte Park
James Dun born c.1879 sailor
David Dun & Margaret Carmichael?, Liverpool at the bottom of page rest of family and in-laws - is this a new family?