From Muriel Leo’s (nee Oliver, 1917-1998) Family Tree.

Year of birth registration, country of birth of NZ, of children from search on New Zealand BDM website in May 2022:
1877/8800. Hughes, Edith Prosser. Mother: Mary. Father: Edwin Charles
1879/45. Hughes, Alfred Clinton. Mother: Mary. Father: Edwin Charles
1880/17150. Hughes, Walter Edwin. Mother: Mary. Father: Edwin Charles
1883/13553. Hughes, Edwina Mary. Mother: Mary. Father: Edwin Charles
1888/813. Hughes, Bertie Oliver. Mother: Mary. Father: Edwin Charles
1896/14336. Hughes, Eilleen Dorothy. Mother: Mary. Father: Edwin Charles