Hello
The 1939 index gives him in Poole with
Reginald Allen born 18 June 1891 munitions worker
Jennie C born 18 April 1897
Reginald J W Allen married Olive J Hardy at Bournemouth Sep qtr 1928.
Dad died 5 June 1961 at Poole leaving an Admin of £260 to his wife Jennie Olive Allen.
Jennie died April 1991.
It looks like he was their only child.
So looking for family farther afield
Reginald James Wellington Allen born 18th June 1891 s of James and Ellen Seend Wiltshire,plasterer
The whole family are in the workhouse 1901
Ellen married charwoman 41 born Bromhill
Dorothy 11,Reginald 9,Millicent 7,Grace Ivy 5
Grandparents married Bremhill 25 Dec 1889 James Allen and Ellen Ponting
Children Dorothy Emily Blanche 1890-8 June 1959 wife of Stanley William Archer Trowbridge,
Reginald 1891,
Gertrude Millicent Helen 1893- Mar 1979 Bournemouth wife of Robert Grady born 1893.Son Frank R A Grady 1934-2009.
and Ivy Ella Grace 1895 who seems to vanish
Grandparent Hardy ---Walter 1871-1953 Swanage bricklayer and Jane Edwards born 1873
Children Delamotte Herald Hardy 22 Jan 1899-17 Aug 1973
George 8 Mar 1900-Mar 2000 Swanage
Ella May 18 Sep 1911-6 Feb 1993 wife of Francis Gerald Eustace.
She's with the Allen family in 1939.
So it's going to be cousins I'm afraid
Lovely idea but I'm struggling to find relatives
Ciderdrinker