Joseph William Emsley was born in 1886 in Marylebone, his mother's maiden name is Denny. He appears with siblings and parents (Richard and Mary Ann) on 1891 census age 4.
piece 104, Folio 56, page 63
Mary Ann (nee Denny) is aged 30 (b abt 1861) born Paddington.
The oldest child Richard James Emsley's birth was registered Q4 1877, so the marriage on 30 July 1877 of Richard Emsley and Mary Anne Deaner (sic) at Willesden seems the most likely. Mary Ann claims to be 18, and says her father's name is Austin Deaner (labourer). The marriage record is on Ancestry and although Mary Ann signed it is impossible to read the surname, It looks like she's signed her maiden name and overwritten with Emsley or vice versa.
The only Austin Denny I can find in right sort of area and appropriate age is the son of John and Mary and is sometimes Daniher rather than Denny.
1861 census: Piece 76, Folio 48, Page 32
1871 census: Piece 93, Folio 53, Page 26
In 1861 he is unmarried, in 1871 he is married but no sign of his wife in the household, nor Mary Ann who would be around 9 - 10.
The only likely marriage I can find is in 1868 in
Marylebone district is of Austin Daniher to either Caroline Hilton or Elizabeth Emma Seymour.
In 1881 there is an Austin Denny with wife Eliza,
Piece 88, Folio 79, Page 39
and an Austin with wife Caroline and daughter Annie b abt 1872
Piece 161, Folio 45, Page 6
or is it one Austin with two households?
Can anyone find Mary Ann in 1871 and identify her mother, please