First given name from Muriel Leo’s (nee Oliver, 1917-1998) Family Tree.

Eileen’s last name provided by Rachel Frances Oliver born 31 August 1940.
Death notice of Eileen’s second husband, Harold Oliver, held by Rachel, lists children to a previous marriage: Gary, Jenny, and Gail.

Maiden name of “Morgan”, date of birth and death from Jennifer Gaskin in a Facebook message dated 05 August 2021. Jennifer (nee Johnson and adopted the Oliver surname as a child) is the daughter of Eileen whose second husband was Harold Douglas Oliver, grandson of Samuel Oliver born 1833.

Second given name, country of death, from death search on New Zealand BDM website in August 2021:
2015/1763. Sergent, Eileen Christina. Date of birth: 6 May 1929

Different day of death of 5 January 2015 from further searching in August 2021 on BDM Search by incrementally changing the date range for the death.

Record of burial from online search of Whanganui District Council Cemetery Search in August 2021:
Reference: S4319
Name: SERGENT, Eileen Christina
Age: 85
Date of Birth: 06/05/1929
Gender: F
Warrant: 8795
Date of Death: 05/01/2015
Late Residence: Wanganui
Occupation: Housewife
Minister: J van Dalen
Director: Dempsey and Forrest
Location: Burial Plot 926; Aramoho, Public Lawn Extension IV, 14

Date and place of first marriage from daughter, Jennifer Gaskin (nee Johnson / nee Oliver), in an email dated 30 August 2021.

Date and place of second marriage (to Harold Oliver) from daughter, Jennifer Gaskin (nee Johnson / nee Oliver), in an email dated 30 August 2021.

Date and place of third marriage (to Albert Sergent) from daughter, Jennifer Gaskin (nee Johnson / nee Oliver), in an email dated 30 August 2021.