I'll try and answer both the questions here. We don't know any of Elizabeth Ann Jackson's history before she was married. From other information we believe (but haven't confirmed) that her parents were William Jackson and Mary Ann Jackson (nee Hunt).
I'm interested in the Hawkes Bay Area as
1. Elizabeth Ann Jackson's death record states she was born in the Coromandel
2. Elizabeth and Thomas were married in Napier
3. All records of their married life (children, electoral roll etc.) are based in Napier
4. Elizabeth Ann and Thomas were both buried in Napier
5. Elizabeth Ann's death record states her father was a sailor
6. Family legend says that Elizabeth Ann's father was involved in whaling
Intention to Marry details
Thomas Neagle (we know he was a soldier in the British army, discharged in Napier)
Ann Jackson
Spinster
Domestic Servant
Age 22 (placing her year of birth around 1840, which ties in with other information we've found)
Dwelling Place: Tennyson St, Napier
Length of Residence: 2 years
Place where marriage to be solemnised: Episcopalian Church, Napier (believed to be the original St John the Evangelist)
Date of Certificate 25 October 1862
Officiating Minister Revd N W St Hill
Their marriage certificate states that they were married on 3 November 1862. Witnessed by Samuel Taylor, Labourer, Napier and Elizabeth [I can't make out the last name].