Just an additional note. An announcement in the Times (Thursday, Apr 20, 1939; pg. 26; Issue 48284; col F) states:
The following appointments were made by the Admirality yesterday:
Entries:
R A SANDOVAL-SIEVIER
There were "In Memoriam" notices in The Times on the date of his death in 1942 and 1943; in both he is also referred to as "Bob" - a family pet or nickname?
A
EDIT: BTW Sievier is one of the variations of
SEVIOUR, a Huguenot name:
http://www.phancocks.pwp.blueyonder....viour/sev2.htm