Not sure yet how this surname fits unless Henrietta was married previously 
James & Mary Ann daughter named Henrietta Smith Evans born c1885
Vauxhall Grove Hull, Holy Trinity and St Mary, Yorkshire & Yorkshire (East Riding)
Charles E O Connor Head 1876 General labourer Tacoma U S a Visitor
Henrietta O Connor Wife 1885 Newport Yorkshire
Novina S O Connor Daughter 1906 Yorkshire Hull
Eileen V O Connor Daughter 1908 Yorkshire Hull
James E H O Connor Son 1909 Yorkshire Hull
Married 6 years 3 children living
Jun 1907
O'CONNOR Eileen Virginia Sculcoates 9d 171 mmn EVANS
Marriage Mar 1905
FAWCETT Mary Elizabeth
Holmes Herbert
Names on same page
O'Connor Charles Edward Sculcoates 9d 221
Robertsen Henrietta Evans
Can’t post details of latest census James is in Sculcoates so is his daughter
Free to search shows year & place of birth
Henrietta O'Connor 1885 Newport, Yorkshire
James Evans 1847 Wisbech, Cambridgeshire
Have just found the marriage to view online didn’t spot it before

Henrietta not previously married so where does surname Robertson fit in with this family

Address matches 1911 census for Marie Ann & James Smith Evans and that of the latest census for a Henrietta O’Connor 1885 & a James Evans 1847
Henrietta Evans Roberson Age 19 single
Residence
3 Balderston Terrace, Liverpool STFather
James Robertson,
deceased occupation
confectioner Married 15 Jan 1905 Newington, St John the Baptist
Spouse Charles Edward O’Connor, 29, fisherman
Spouse's marital status B
Spouse's residence 3 Balderston Terrace, Liverpool St
Spouses father Cornelius O’Connor, farmer
Henrietta can be found on 1939 Register Henrietta Oconnor [Hill] 1885, she remarried 1941, with her
James Evans b1872 (this must be her brother)
This is her death giving dob, not found her birth reg. on GRO indexes
Henrietta Hill
Death Age 87
Birth 28 Jan 1885
Mar 1972 Hull Yorkshire East Riding Volume 2a Page 546