I've been asked to post this by Jean C as she is encountering some computer difficulties
Re: John Henry Taubman 1917-1945

Two Ancestry trees say that the John Henry Taubman who was killed 21 Jan 1945/buried in Stittard War Cemetery, was the son of Henry Taubman and Sarah Frances Bridson. But they give no further details, not even a birth year.

After some digging around, I think that this looks like the right one (assuming that the Ancestry trees are correct):

From birth registration index:
Name: John H Taubman
Registration Date: Apr 1916
[May 1916]
[Jun 1916]
Registration Quarter: Apr-May-Jun
Registration District: West Derby
Inferred County: Lancashire
Mother's Maiden Name: Bridson
Volume Number: 8b
Page Number: 1099
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Marriage of his parents (from familysearch):

Name:Henry Taubman
Event Type:Marriage
Event Date:30 Oct 1909
Event Place:Malew, Isle of Man
Event Place (Original):Malew, Isle of Man
Gender:Male
Age:28
Marital Status:Single
Birth Year (Estimated):1881
Father's Name:John Taubman
Spouse's Name:Sarah Francis Bridson
Spouse's Gender:Female
Spouse's Age:19
Spouse's Marital Status:Single
Spouse's Birth Year (Estimated):1890
Spouse's Father's Name:Thomas Bridson

In 1911, his parents were at 123 Malew St, Castletown, IOM.
HT 30 sailor in Merchant Service b Castletown
Sarah 21, married 2 yrs/no children, b Peel

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Can’t find any siblings of John Henry Taubman b 1916 (born on IOM or mainland).

Can’t find a marriage for John Henry Taubman b 1916.
from 1939 register

Living at 7 Aigburth Road, Liverpool, with a mixture of people with different surnames, so probably a boarder:

Name: John H Taubman
Gender: Male
Marital Status: Single
Birth Date: 12/02/1916 (12 Feb 1916)
Residence Year: 1939
Address: 311
Residence Place: Liverpool Lancashire England
Occupation: Post Office Sorting Clerk
Line Number: 22
Schedule Number: 7
Sub Schedule Number: 6
Enumeration District: NHVA
Borough: Liverpool
Registration district: 453-6

Jean C