Name from New Z New Zealand Electoral Rolls found in January 2019:

1946 Wellington Central General Roll
McGonagle, Joyce Dyson, 2 Allenby Terrace, married
McGonagle, Kenneth Norman, 2 Allenby Terrace, chemist

1949 Eden [Auckland] General Roll
McGonagle, Joyce Dyson, 13 Esplanade Road, S.1, married
McGonagle, Kenneth Norman, 13 Esplanade Road, S.1, grocer
McGonagle, Doris Paulucci, 20 George Street, S.W.1, spinster [Sister of Kenneth]

1954 Eden [Auckland] General Roll
McGonagle, Joyce Dyson, 35 Dexter Ave. S.2, married
McGonagle, Kenneth Norman, 35 Dexter Ave. S.2, grocer
McGonagle, Doris Paulucci, 20 George Street, S.W.1, spinster [Sister of Kenneth]

1957 Onehunga [Auckland] Main Roll
McGonagle, Joyce Dyson, 374 Queen St., SE5, married
McGonagle, Kenneth Norman, 374 Queen St., SE5, stationer

1963 Onehunga [Auckland] Main Roll
McGonagle, Joyce Dyson, 65 Selwyn St., SE5, Retired
McGonagle, Kenneth Norman, 65 Selwyn St., SE5, Retired

1969 Auckland Central Main Roll
McGonagle, Kenneth N, 12 Garfield St, clerk [Joyce not listed here with Kenneth]

1969 North Shore [Auckland] Main Roll
McGonagle, Joyce D, 21 Regent St. Clerk [Joyce listed separately]

Divorce of husband, Kenneth Norman McGonagle:
Auckland Divorce files
McGonagle, Kenneth Norman v McGonagle, Joyce Dyson. 1968-1969, High Court Auckland, Department of Justice.