Its a pretty big change Dorothy to Dean; Kate to Kathleen not too hard to swallow

Name: Dorothy Kate Adams
Year of Registration: 1901
Quarter of Registration: Jul-Aug-Sep
District: Monmouth (1837-1939)
County: Gloucestershire, Herefordshire, Monmouthshire
Volume: 11a
Page: 24

Name:George A Hayward
Name: Kathleen D Adams
Date of Registration: Oct-Nov-Dec 1934
Registration district: Monmouth
Registration county (inferred): Monmouthshire
Volume Number: 11a
Page Number: 76

Given her age of 33 ish - any hint that was she married before ? perhaps to a DEAN