Oddly, although 1894 is the best match for Census records and gravestone, in the BMD:

Oct-Nov-Dec 1892
Arthur Joseph D Young Bath, Avon, Somerset 5a 537

Alson in http://www.ukbmdsearch.org.uk

Surname Forename(s) Mother's Maiden Name Year Sub-District Registers At Region Reference
YOUNG Arthur Joseph Dent SHEPARD 1892 Lyncombe/Widcombe - First Series Bath Bath LW1/38/252

RG13 Piece: 1424 Folio: 149 Page: 5
Northampton Sub District: St Giles EnumerationDistrict: 43
81, Abington Street, Northampton St Giles
SHEPARD, Katherine M Head Single F 35 1866 Northampton
SHEPARD, Annie M Sister Single F 34 1867
SHEPARD, Joseph S Half Brother Single M 58 1843 Leather Merchant Nottingham
SHEPARD, William B Brother Single M 36 1865 Leather Merchant Northampton
DENT -YOUNG, Arthur Nephew Single M 8 1893 Bath
BOSHELL, Kathleen Cousin Single F 16 1885 Colombia (British Subject)
CROFTS, Elizabeth Servant Single F 23 1878 Cook (Domestic) Elkington Northamptonshire
DAWSON, Ellen Servant Single F 18 1883 Housemaid (Domestic) Northampton

* According to the United Kingdom Census 1901 (see attached), Maria (Kathleen Mary) Boshell 16 years was in Northamton UK with their families Katherine M. Shepard 35, Annie M. Shepard, 34, William B. 36, Joseph 58, Arthur Dent - Young 8 years.

* Según Censo del Reino Unido de 1901 (ver documento adjunto), Maria (Kathleen Mary) Boshell de 16 años estuvo en Northamton Reino Unido con sus familiares Katherine M. Shepard de 35 años, Annie M. Shepard de 34 años, William B. de 36 años, Joseph de 58 años, Arthur Dent - Young de 8 años.

Person: YOUNG, Arthur
Institution: Ampleforth College Roman Catholic School And Abbey, AMPLEFORTH COLLEGE, ROMAN CATHOLIC SCHOOL AND ABBEY

YOUNG, Arthur Inmate Single M 17 1894 Student Somersetshire Bath

Reference: RG14PN29074 RD531 SD1 ED15 SN9999

Ref: British Army WWI Medal Rolls Index Cards, 1914-1920 Record for Arthur J Dent Young

Medals: MGC Victory Off. 227 page 224D
15. Star C/2/6 B2 page 336
On R+L Roll C/2/102 B 01/1 / 2567

29.August 1915 First Theatre of War (5G : Frontier regions of India)
- 1/4 Somerset Light Infantry Private 2445

17.November 1915 Commissioned Dorsets
- Machine Gun Corps Lieutenant

9th November 1923 Ret. -(E79) ... Medals returned to Medals Office ??

Ref: 1918 Army List 1256g ??
Dorsetshire Regiment. 3rd Battalion (Reserve)
Lieutenants
t.r. Young, A.D. 1 July 17

http://www.london-gazette.co.uk/issues/29381/pages/11763/page.pdf

MACHINE GUN CORPS.
The undermentioned temporary Officers
are transferred from units as under, with
effect from dates shown against their names,
retaining their present seniority : —
:
2nd Lt. A. J. Dent-Young. 16th Mar. 1916

http://www.london-gazette.co.uk/issues/29697/supplements/7766/page.pdf

Active List p. c xxxiii

Dent-Young, A.J. 1260e

PRIVATE JULIUS H. DENT-YOUNG, London Regiment, who was previously reported " missing," is now known to have been killed in action on July 1, aged 20. He went to the front a year ago. was wounded at Hulluch last September. and rejoined his regiment In January. He was the fourth and youngest son of Mr. J. Dent-Young, C.E., of Bath, who married a daughter of the late Mr Thomas Shepard. of Northampton. Their eldest son, Lientenant John Dent- Young, is In the 1st Nigerian Regiment, West African F.F. Their two other sons hold comnuissions, one in tho I th Battalion Australian Imperial Force, and the other in the Machine-gun Corps.