Stanners

[CanScot]

My paternal great grandmother was Helen Fraser b1886 in Edinburgh. She was illegitimate with only her mother, Janet Fraser, listed on the birth certificate. Her mother married in 1886 (Hugh Mackintosh) and she (Helen) is identified as Helen Fraser Mackintosh on the 1901 census, Helen F.S Mackintosh in 1902 when she marries Daniel Sinclair and Helen Fraser on her death certificate in 1956. Sounds all very straightforward.
However, on her son's death certificate she is identified as Nellie Sinclair (maiden name Stanners). I found a Helen F Stanners (b1886 Midlothian) on the 1891 census for Bridgeness, Carriden. She is listed as the adopted daughter of James and Betsy Stanners.
So, my question is (and I may be completely wrong) could Helen's biological father be a Stanners? If not then why would she be adopted in 1891 and then be living with her mother in 1901? Any advice would be welcome.

[Kloumann]

On Scotlands People, her death record in 1956, Dalmeny & Queensferry, has Helen Fraser Sinclair & Helen Fraser McInrosh.

[Kloumann]

Did you find Janet & Hugh on 1891 census?

Added
Janet is Jessie on 1891 census, Queensferry & there is a Nelly Mackintosh but her age is given as 16
Hugh is 47.

[CaroleW]

There was no legal adoption back then - just private arrangements made between the various parties

[CaroleW]

If you track the Stanners back through the censuses they only had 2 sons - Walter b about 1856 and Alexander 1867

Walter married Jemima Hamilton in 1891

[Kloumann]

What was Helen's son's name & birth/death details?

[CanScot]

David Thomson was born on July 17th 1907 ands died April 11th 1955. He was one of six children.

[CaroleW]

Reply removed to avoid confusion - wrong timescale

[Kloumann]

Did the other siblings of David Thompson also give MMN as Stanners?