Henry Hugh Allen 
Henry Seymour Allen 
He lived at Cresselly, Pembrokeshire, WalesG.
Frederick Seymour Allen 
Child of Frederick Seymour Allen and Bessie Constance Coghlan
- Catherine Seymour Allen b. 30 Jul 1897
Bessie Constance Coghlan
Her married name became Allen.
Child of Bessie Constance Coghlan and Frederick Seymour Allen
- Catherine Seymour Allen b. 30 Jul 1897
Catherine Seymour Allen
Her married name became Dawes.
Leslie Fraser Spearman Dawes
Francis Seymour Allen 
Children of Francis Seymour Allen and Florence Emma Mary Symonds
- Reginald Seymour Allen+ b. 30 Jan 1879
- Hugh Evelyn Allen+ b. 31 Mar 1880, d. 3 Feb 1933
- Guy Francis Seymour Allen+ b. 14 May 1883, d. 15 Apr 1923
- Evelyn Prestwood Seymour Allen b. 14 Dec 1885
Florence Emma Mary Symonds
Her married name became Allen.
Children of Florence Emma Mary Symonds and Francis Seymour Allen
- Reginald Seymour Allen+ b. 30 Jan 1879
- Hugh Evelyn Allen+ b. 31 Mar 1880, d. 3 Feb 1933
- Guy Francis Seymour Allen+ b. 14 May 1883, d. 15 Apr 1923
- Evelyn Prestwood Seymour Allen b. 14 Dec 1885
Reginald Seymour Allen 
Child of Reginald Seymour Allen and Maria Florence Walsh
- Florence Delarivere Katherine Jane Allen b. 18 Aug 1924
Maria Florence Walsh
Her married name became Allen.
Child of Maria Florence Walsh and Reginald Seymour Allen
- Florence Delarivere Katherine Jane Allen b. 18 Aug 1924
