Given names from birth search of daughter on New Zealand BDM website in July 2025:
1878/12298. Denny, Hannah Gertrude. Mother: Margaret Ann. Father: Charles Benjamin

Maiden name, date and place of marriage from the entry in the India Marriage records found in July 2025:
Groom: Benjamin Denny
Bride: Margaret Ann O'Brien
Marriage Date: 02 Dec 1858
Marriage Place: Rawul, Pindee, Bengal, India
Groom’s Father: John Denny
Bride's Age: 14
Bride's Birth Date: 1844
Bride's Father: Patrick O'Brien

Year and country of death, from death search on New Zealand BDM website in July 2025:
1915/5151. Denny, Margaret Ann. Died age 69Y [Therefore born circa 1846 which is different to marriage record. Did Margaret marry at a younger age?]

Full date of death of 23 July 1915 from further searching in July 2025 on BDM Search by incrementally changing the date range for the death.

Year of birth given as "1946", date and place of baptism, mother's name, from the Ireland, Catholic Parish Registers, found in July 2025:
Margaret Anne: O Brien
Baptism Age: 0
Event Type: Baptism
Birth Date: 1846
Baptism Date: 26 Jan. 1846
Baptism Place: St Michael's, Limerick city, Limerick, Ireland
Parish Variants: St. Michaels, Limerick
Diocese: Limerick
Father: Patrick O Brien
Mother: Jane MCcAIN