Looking for Robert Edward Davis Wanganui Auckland New Zealand

We are looking for our grandfather and have Robert Edward Davis marring Lillian Ellen Langlois in 1920 at Wanganui. There are children ther named Hazel Davis b(1923) that married Tom Bevin and Robert (bob) Donald Davis b (1924)
Robert Edward Davis lived in Auckland form 1928 on at Different address's ( I have all the addresses) and there is a John Thomas Davis at Brookby Clevendon Papakura as a farmer where Robert E. and lillian Davis were all on the electroal roll.

1938 Robert Edward Davis Engineer: c/o John Thomas Davis (is this his Son/ brother?) Farmer, Brookby, Clevendon with Lillian Ellen Davis: is there son/ Brother?
1949 Ponsonby: Robert Edward Davis 35 Albany Rd W1 Engineer with Lillian Ellen Davis
1957: Lillian Ellen Davis; Presser, with Robert Edward Davis Engineer, 35 Albany Rd AK Ponsonby.
1963: Robert Edward Davis Engineer, & Lillian Ellen Davis Presser, at 18 Beaconsfield St W2 Grey Lynn

1905 Thomas Langlois: Somerville: labourer; Mataroa Rangitikei Manawatu Wanganui NZ
1928; Thomas Henry Langlois 39 Cobden Street, Auckland central; Seaman
1928: Thomas Henry Langlois: 31 Francis Street Grey Lynn Seaman.
1935: Edna May Langlois Catherine Street; Henderson Married.
1935: Nelson Joseph Langlois Catherine St. Henderson; Salesman.
1935: Thomas Henry Langlois 1 Sunny Brae Crescent W2 Labourer
Can you help? www.davisfamilytree.org for more info. Thanks Ross Davis