G'day Trish, Thanks for getting in touch with me. You are researching the same David Gray from Thaxted, Essex as me. He married Isabella Hely (on her marriage certificate)/Healy on 7/6/1852 at St Andrews Scots Church Sydney, by Rev. John McGarvie. Married by Banns.
On her death certificate, Spain (no town) is listed as her place of birth, her son David was the informant. You have listed that her death certificate of 1912 mentions that she died in Campbelltown, NSW. She died at RPA Hospital Camperdown.
I am descended from David and Isabella/Elizabeth's son Francis (Frank) Henry Gray, who married Sarah Davis. I am the granddaughter of Frank and Sarah's youngest son/child Harold Charles Gray. My pop always told me that his grandmother, Isabella was Irish. On Francis' birth certificate, , where she is noted as Elizabeth Healy, and she was 22 at his birth, David was the informant and he has said that her birthplace was Ireland. On her husband David's death certificate, she is noted as Isabella Healey.
As I said in my first query, I cannot find an Isabella Hely/Healy arriving in Australia at all. I can find a Margaret Healy, arriving on the same ship as David Gray. Her shipping information says that she was from Co Clare and that her father was Patrick and her mother was a Margaret. I am not 100% sure that this Margaret is the same person as Isabella. That is why I thought that perhaps she could have been known as Isabella if she had the same name as her mother, and Isabella was her middle name. (I have a friend Margaret Isabella, though known as Margaret as her mother has a different name). Seeing that David married Isabella not too long after coming here, and knowing no one in the colony, it seems likely that they could have met on the ship coming over.
I have heard before, from another descendant, that Isabella came from Spain and was an impoverished Spanish Princess. I have since lost touch with this person, which was only the once, about 13 years ago. Hely/Healy/Healey, is more an Irish/English name than Spanish, so for her to be born in Spain, her parents would have had to be in Spain for a reason, whatever that could be. I hope that this explains my thoughts as to her being Irish. If you have any other query/ies, please do not hesitate to get in touch. If I can help you in any way, I can.
I too live in NSW.
Kindest regards, Rhonda Macrae nee Gray.