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

Date of birth and year of death, photo as a young man, from Joy (Margaret Joy) Nixon - nee Oliver, daughter of Leslie John Oliver.

Place and date of death from download by Dax Lloyd (great-grandson of Jessie Bertha Oliver b.1876) from NZGBD, source: NZPAF-PSNC.ged

Dax later writes giving Leslie’s burial record:
“Record no.: CEMIRA1834
Surname: Oliver
First Name(s): John Leslie
Cemetery: Rakaia
Area: Presbyterian
Plot Number: 392
Longitude: 171.993370
Latitude: -43.754137
Denomination: PRESBYTERIAN
Occupation: RETIRED FARMER
Additional Information:
Age (Years): 76
Age (Months): 0
Date of Death: 29/9/1980
Interment: 2/10/1980
Purchaser: Est J L Oliver
Date Purchased: 23/4/1997
Depth: EXTRA DEPTH
Funeral Director:
Celebrant: REV PHILLIPS”

Brian of nzolivers.com notes that the first and second names are reversed in the above records, being “John Leslie”?

Year and country of first marriage to Mona from search on New Zealand BDM website in October 2018:
1925/304. Bride: Moana Elsie Hardley. Groom: Leslie John Oliver

Full date of first marriage of 2 February 1925 from further searching in October 2018 on BDM Search by incrementally changing the date range for the marriage.

Year and country of second marriage from search on New Zealand BDM website in September 2022:
1942/8048. Bride: Laura Edith Barford. Groom: John Leslie Oliver

Full date of second marriage of 8 August 1942 from further searching in September 2022 on BDM Search by incrementally changing the date range for the marriage.

Inscription and photo of headstone, burial with third wife, obtained from a link to Find a Grave website in an email dated 20 January 2023 received from Katia, wife of Tim Grant Oliver:
https://www.findagrave.com/memorial/184643265/john-leslie-oliver
Inscription
In Loving Memory Of
John Leslie
Loved Husband Of
Gladys Oliver
Died 29th Sept. 1980. Aged 76
PLOT: Presbyterian - 392
Tim Oliver is a x3 great grandson of James and Ruth Oliver, his grandfather being Ivor James Clark Oliver (1907-1989).