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Do you mean he was born in 1917, or died in 1917?

EDIT:
Presumably that's the date of the obituary , as it doesn't seem possible to specify a birth or death year on the Newspapers.com Obituary Index, 1800s-current, which is what you specified.

https://www.ancestry.co.uk/search/collections/61843/

It seems to be mainly USA deaths/obituaries, and most of them do have relatives' names.

But there are lots of George William or George W Prestons on it, even when specifying 1917 as the obituary date.
Where did the record you found say he died?

Clicking on any result gives you a transcription, and also a link to Newspapers.com, where you need to subscribe to be able to see an image of the original.

Commonwealth War Graves Commission site - FREE - https://www.cwgc.org//

LEADING SEAMAN
GEORGE WILLIAM PRESTON
Service Number: J/3993
Regiment & Unit/Ship
Royal Navy
H.M.S. "Vanguard."
Date of Death Died 09 July 1917
Age 24 years old
Buried or commemorated at
CHATHAM NAVAL MEMORIAL
21.
United Kingdom

Country of Service
United Kingdom
Additional Info
Son of Arthur George Preston, of Silverleys Green, Cratfield, Halesworth, Suffolk.

Additonal info re the death

At Scapa Flow, killed by internal explosion of vessel

I can't see any mention of the mother on any records which come up on Ancestry. Perhaps you'd C&P - just to satisfy my curiosity ;-)

1881
Silverlase Green, Cratfield, Blything, Suffolk, England
George Preston Head Married Male 28 1853 Labourer Cratfield, Suffolk, England
Harriott Preston Wife Married Female 29 1852 Labourer Wife Suffolk, England
Charles Morris Son Single Male 8 1873 - St Margarets, Suffolk, England
Anna Preston Daughter Single Female 6 1875 - Cratfield, Suffolk, England
Arthur Preston Son Single Male 1 1880 - Cratfield, Suffolk, England
Charles Preston Lodger Widower Male 66 1815 Labourer Weybread, Suffolk, England

1891

Silverlace Green, Cratfield, Blything, Suffolk, England
George Preston Head Married Male 38 1853 Agricultural Labourer Cratfield, Suffolk, England
Harriet Preston Wife Married Female 29 1862 - Wissett, Suffolk, England
Charles Preston Son Single Male 18 1873 Agricultural Labourer St Margarets, Suffolk, England
Arthur Preston Son - Male 11 1880 - Cratfield, Suffolk, England
Harry Preston Son - Male 9 1882 Scholar Cratfield, Suffolk, England
Emma Preston Daughter - Female 6 1885 Scholar Cratfield, Suffolk, England
Solby Preston Daughter - Female 4 1887 Scholar Cratfield, Suffolk, England
James Preston Cousin Single Male 23 1868 Agricultural Laborer Cratfield, Suffolk, England

Marriages Dec 1873 (>99%)
MORRIS Harriett Blything 4a 1601
Preston Arthur George Blything 4a 1601

Charles Morris was Harriet's child prior to her marriage

1911

Silverleys Green Cratfield Halesworth Suffolk, Cratfield, Suffolk, England
Arthur George Preston Head Married Male 58 1853 Farm Labourer Cratfield Suffolk
Lily Preston Wife Married Female 27 1884 - Aldringham Suffolk

Married 5 years

1901

Silverlace Green, Cratfield, Blything, Suffolk, England
George Preston Head Married Male 48 1853 Agricultural Labourer On Farm Cratfield, Suffolk, England
Harriet Preston Wife Married Female 49 1852 - Wissett, Suffolk, England
George W Preston Son - Male 7 1894 - Cratfield, Suffolk, England
William G Preston Son - Male 7 1894 - Cratfield, Suffolk, England

The man's mother's name wouldn't change because she had died

Deaths Jun 1903 (>99%)
Preston Harriet 52 Blything 4a 531

Births Sep 1893 (>99%)
Preston George William Blything 4a 931
Preston William George Blything 4a 931

If they are pay-to-view sites, there is no free access.

Is this the person in question?

Name: George William Preston
Rank: Ldg Smn
Birth Date: 25 May 1893
Birth Place: Halesworth, Suffolk, England
Branch of Service: Royal Navy
Cause of Death: Killed or died by means other than disease, accident or enemy action
Official Number Port Division: J.3993. (Ch)
Death Date: 9 Jul 1917
Ship or Unit: HMS Vanguard
Location of Grave: Not recorded
Name and Address of Cemetery: Body Not Recovered For Burial
Relatives Notified and Address: Father: Arthur G; Silver Lace Lane, Green, Cratfield, Nr Halesworth Suffolk

Hi

I keep seeing hints for Obituaries on Ancestry but when you go into them ? well you can't without paying does any one know of any free sites for this I keep going round in circles on google
The last one was newspaper.com Obituary index 1800 to currant for a George William Preston 1917