My grandfather was born in 1910, he was given up and placed in an orphanage and later adopted, his name is Athel Milton.
His mother is registered on the birth certificate as Ethel Milton, we believe she was from Aberdeen but was working as a maid in Kent UK, we don’t know if she was married or not.
This is the only information I have, DNA testing is showing up with Canadian DNA but I’m completely lost further than this.
Is this your grandfather?
Birth registration in 1913
MILTON, ATHOL Mother - Milton
GRO Reference: 1913 J Quarter in MAIDSTONE Volume 02A Page 1760
In the 1911 census Chatham Kent, there is a Ethel MILTON working as a domestic servant.
She is living in the house of her step-father John CLIFFORD
https://www.familysearch.org/ark:/61903/1:1:XWDN-YBW1901 census for Ethel
https://www.familysearch.org/ark:/61903/1:1:X9F3-QXCBirth registration
MILTON, ETHEL ELIZA Mother’s maiden name - KING
GRO Reference: 1895 M Quarter in MEDWAY Volume 02A Page 607
(Birth date was 26 Dec 1894)
Ethel’s mother Maria Annie KING (born abt 1865 Chatham) married Samuel Amos MILTON (born abt 1865) who died 29 May 1899 in Chatham
1891 census
https://www.familysearch.org/ark:/61903/1:1:QV7Q-VW2Maria Annie MILTON (widow) married John CLIFFORD 5 May 1901 in Chatham Kent
A marriage in 1914 Kent for Ethel E MILTON to John CARTER
It looks as if they had about 7 children.
Ethel Eliza CARTER (nee Milton) died in Chatham in 1983.
I don’t know if this is correct for your family, but DNA might confirm or eliminate