Not sure why her birth record has her mother as Helen Haplet?
The family in 1900 census.
1900 census:
https://www.familysearch.org/ark:/61903/1:1:MM5D-VNV====
Helen's father Frederick Tonge died in 1926. Residence is listed as 1453 Willard St.
Death:
https://www.familysearch.org/ark:/61903/1:1:Q23Q-4YLR The San Francisco Examiner
San Francisco, California
09 Aug 1926, Mon • Page 4
Obit:
https://www.newspapers.com/clip/62739508/frederick-tonge-death/====
Helen & Wilfred Prout get married in 1927. Her address is given as 1453 Willard St.
The San Francisco Examiner
San Francisco, California
08 Apr 1927, Fri • Page 4
Clip:
https://www.newspapers.com/clip/62739677/tonge-prout-marriage/Helen 1930 census. Parents born England & New York, same as 1900 census.
1930 census:
https://www.familysearch.org/ark:/61903/1:1:XCNZ-HZ4============
Helen's brother Frederick gets married in 1930. His mother is listed as Mary Jane O'Shaughnessy.
Marriage:
https://www.familysearch.org/ark:/61903/1:1:K8JM-SB7===
Helen's mother Mary Jane died in 1956. Obit list daughter as Helen G Prout
Death:
https://www.familysearch.org/ark:/61903/1:1:VPWW-YD9 The San Francisco Examiner
San Francisco, California
13 Jan 1956, Fri • Page 47
Obit:
https://www.newspapers.com/clip/62739976/mary-jane-tonge-death/==========
Helen G Prout died in 1988. Mother's maiden name is listed as "O'shannessee"
CADI:
https://www.familysearch.org/ark:/61903/1:1:VPV3-NGZ The San Francisco Examiner
San Francisco, California
26 Sep 1988, Mon • Page 18
Obit:
https://www.newspapers.com/clip/62740526/helen-g-prout-death/Find A Grave:
https://www.findagrave.com/memorial/87660905/_=======================
Again... All records indicate Helen's mother was Mary Jane O'Shaughnessy, not Helen Haplet, as is on the birth record.