I think the family are from Cardiff?
The 1891 census has a Rosina, age 1, born Cardiff, living at Christina Street, Bute Town (formerly know as "Tiger Bay" but now completely redeveloped as upmarket Cardiff Bay!). Her parents are Charles (33, Smith's Striker, Cardiff) & Alice (33, Cardiff) Stephenson. There are siblings Henry (12, Errand Boy, Cardiff); Sara A (10, Scholar, Cardiff); Louisa J (9, Scholar, Cardiff); Alice (7, Scholar, Cardiff); Charles (6, Scholar, Cardiff); Edward J (4, Scholar, Cardiff).
Born 1890 Q1: Rosina Stephenson - Cardiff 11a 372
Another researcher seems to have researched this family in some detail: Parents - Matthew Charles Ayton Stephenson & Alice Workman; Spouse - Frank E J Clarke; Children - Rosina G L Clarke; Doris E Clarke.