Help searching for Dorothy Drew

[nlarkin1]

Hi, can anyone help me identify birth/family records for Dorothy Rosina Stephens-Drew please?
She appears on the 1939 register living in South Coast Road outside Brighton. She is single, but there seem to be two DOBs: 27 August 1890, and 22 August 1900.
Her death index entry on GRO in 1984 for Hove lists her DOB as 22 August 1904, and spells her surname Stevens-Drew.
There are quite a lot of electoral register entries on Ancestry starting from the 1920s through the decades, but none seem to have her living with any family from what I can see. I've been unable to find any record of her birth, or for other Stephens-Drews for that matter.
Any help would be much appreciated!
Many thanks
Nick

[gc1]

You mention electoral registers
The 1939 register also has her DoB as 22 Aug 1900
Residence Place  Chailey, Sussex, England
Occupation    Private Means

At the same address
Ruby Garnham                           Female        1877

But as you say no real Family 

[rosie99]

1921 has her as Dorothy Rosina Drew living in Surbiton with the same person as 1939 - she is a relative apparently

[rosie99]

1911 in Surbiton with Ruby and her mother, listed as niece . Place of birth Chobham, Surrey

[gc1]

1911 Census

Has her in Surbiton with Emma Garnham listed as Relationship to Head of Household   Head

Dorothy Rosina Drew and listed as Relationship to Head of Household   Niece

Ruby is listed as Relationship to Head of Household   Daughter

So must be some family around somewhere

Edit
Crossed post with above

[osprey]

rather older though - also in same household in 1901

1911
https://www.familysearch.org/ark:/61903/1:1:XWDM-WMB?lang=en

[AlanBoyd]

Composed before recent posts, but…

Something to ponder:

3 April 1924: Nottingham Evening Post

LOCAL WILLS
...
MR. H. J. GARNHAM, DERBY.
Mr. Harry John Garnham. of 7, Charnwood-street, Derby, manager of the Palais de Danse, Derby, who died on December 21st, has left £6,035, with net personalty £5,645. The will is proved by Mrs. Garnham, the widow, and Alfred William Berry, of Winterdown Lodge, Thames Ditton, Surrey.

He leaves all the property to his wife for life, and then as to £250 each to his sister, Ruby Garnham, and Rosina Dorothy Drew, and the ultimate residue to his adopted daughter, Barbera Emma Garnham.

[AlanBoyd]

?
birth registration
Rosina Drew
Q4 1890 Chertsey, Surrey
mmn Stevens

age in 1921 fits with this date

added: this Rosina Drew seems to be with her parents Steven and Elizabeth Drew in Chobham in 1891 aged 7 months

[osprey]

baptism Chobham 28 June 1891
Rosina born 22 August daughter of Elizabeth Drew