Hi & welcome Tennant
Not much help with your research but here are a few things i found relating to the family.
Marriage: 25 Dec 1888 St James, Broughton, Lancashire, England
Samuel Tennant - 25, Joiner, Bachelor, 14 Charlotte Street
Louisa Eleanor Worthington - 22, Spinster, 10 Peter Street
Groom's Father: Stephen Tennant, Joiner
Bride's Father: Edwin Worthington, Coachman
Witness: Edwin James Worthington; Julia Caroline Worthington
Married by Banns by: C. E. Stewart, Rector
Baptism: 2 Jun 1889 St James, Broughton, Lancashire, England
Stephan Tennant - Child of Samuel Tennant & Louisa Eleanor
Born: 30 Apr 1889
Abode: 14 Charlotte Street
Occupation: Joiner
Baptised by: F. La Mothe, Curate
Baptism: 24 Jan 1892 St James, Broughton, Lancashire, England
Edwin Tennant - Child of Samuel Tennant & Louisa
Born: 7 Dec 1891
Abode: 14 Charlotte Street
Occupation: Joiner
Baptised by: C. E. Stewart, Rector
Baptism: 16 Dec 1896 St James, Broughton, Lancashire, England
Alfred Eastman Tennant - Child of Samuel Tennant & Louisa Eleanor
Born: 19 May 1894
Abode: 14 Charlotte Street
Occupation: Joiner
Baptised by: J. Heywood Waddington, Curate
Baptism: 16 Dec 1896 St James, Broughton, Lancashire, England
Fanny Tennant - Child of Samuel Tennant & Louisa Eleanor
Born: 7 Nov 1896
Abode: 14 Charlotte Street
Occupation: Joiner
Baptised by: J. Heywood Waddington, Curate
Baptism: 19 Feb 1899 St James, Broughton, Lancashire, England
Doris Tennant - Child of Samuel Tennant & Louisa Ellen
Born: 5 Dec 1898
Abode: 14 Charlotte Street
Occupation: Joiner
Baptised by: C. E. Stewart, Rector
Baptism: 4 Jun 1902 St James, Broughton, Lancashire, England
Frank Tennant - Child of Samuel Tennant & Louisa Eleanor
Born: 2 May 1902
Abode: 26 Marsland Street
Occupation: Joiner
Baptised by: Wm. L. Hugill
Baptism: 12 Oct 1910 St Alban, Cheetham, Lancashire, England
Arthur Tennant - Child of Samuel Tennant & Louise Ellenor
Born: 29 Apr 1907
Abode: 93 Pendine St
Occupation: Joiner
Baptised by: W. Kenneth Maclure
Stephen's younger brother also served world war one.
There is a will for Stephen Tennant who died 25th March 1918 on this site but is a pay to view site, just put his details in the soldiers will section
linkBen