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

Year/place of birth, date/place of death, and second name, from Jenny Smith whose late husband, John Monro Menzies, was the grandson of Teitha Carrel (b. 1885), sister of Maud Oliver (nee Carrel).
Marjorie and Shirl had four children: son, daughter, son, daughter.

Result from birth search on New Zealand BDM website in August 2018:
1912/13539. Menzies, Marjory Lena. Mother: Telitha Mary. Father: Ronald Monro
(Note different spelling of “Marjory”?

Full date of birth of 20 June 1912 from further searching in August 2018 on BDM Search by incrementally changing the date range for the birth.

Year and country of marriage from Marriage search on New Zealand BDM website in August 2018:
1937/2947. Bride: Marjorie Lena Menzies. Groom: Shirley Maxwell Anderson

Full date of marriage of 11 March 1937 from further searching in August 2018 on BDM Search by incrementally changing the date range for the marriage.

New Zealand Electoral Roll - Hawkes Bay General Roll 1935, found in October 2018:
Menzies, Marjorie Lena, 808E Heretaunga St., Hastings, spinster
Menzies, Ronald Monro, 808E Heretaunga St., Hastings, carpenter [Father]
Menzies, Telitha Mary, 808E Heretaunga St., Hastings, married [Mother]
Menzies, Samuel Monro, 808E Heretaunga St., Htgs, station hand [Brother]
Menzies, Dorothy Mary, 808E Heretaunga St., Hastings, spinster [Sister]