Moore Family from Redruth Cornwall

[NieuwFam]

I am assisting my brother in law Frank Moore with his family tree. Franks great grandfather William Moore came to South Australia with his wife Mary Ann Jones and a two year old child Mary Ann in 1857 on the ship Marion. They subsequently had five additional children in South Australia.
William died 10 May 1909 age 77 and is buried in the West Terrace cemetery Adelaide. His obituary indicated that he was a native of Redruth Cornwall and came to South Australia as a miner.
The ships manifest clearly identifies William Moore's wife as Mary Ann Jones and in the South Australia birth records she is clearly identified as such on the birth records of the five children born in South Australia.
A number of website family trees, including in My Heritage, Find My Past, Ancestry, Family Search,  identify William as being married to Mary Ann Johns 18 April 1853. And indeed there was a marriage to such a couple in the parish church Redruth. I have a copy of the marriage certificate from GRO to prove it.
However I have some unanswered questions as to whether this is the couple that came to South Australia on the Marion and settled there. She was a Johns on the marriage certificate but it was a William Moore and Mary Ann Jones that boarded the ship for Australia four years later. If that had simply been a typo or transcription issue I could work with that, but the Mary Ann that had another five children was also recorded as Jones in South Australia. 
Was there another William Moore in the Redruth district about that time who married a Mary Ann Jones? Or is Mary Ann Johns and Mary Ann Jones one and the same person. If she was a Johns by birth (her fathers name is Zacharias Johns) and marriage, why was her name changed to Jones for passage to Australia and then retained Jones for the rest of her life? 
My limited ability at searches has not turned up those answers for me. If there is anyone really proficient in Cornwall family history I would be so pleased to get some advice and or insight.

ID in FamilySearch for William Moore is KHZK-14F Some documents are posted in his file for reference.



   

[chempat]

Welcome to rootschat, NieuwFam

Is this the birth of daughter Mary Ann in Cornwall

Mary Ann Moore, mmn Johns
GRO Reference: 1854  M Quarter in REDRUTH  Volume 05C  Page 286

[NieuwFam]

The William Moore and Mary Ann Jones that went to Australia had a daughter with them called Mary Ann age two according to the ships manifest. The Marion left Plymouth, (where I presume they boarded) for Australia on the 8th Oct 1856 so the little girl would have been born in 1854.
Thanks for responding to my post.

[chempat]

Were William and Mary literate, and so could check that surnames were recorded as the family normally spelled them?
I think it is just a change in spelling, Johns + Cornish accent common in Cornwall, not elsewhere.

[Jamjar]

Where do you see Mary as Jones on the manifest? On page 3, I see only Mary A:

https://archives.sa.gov.au/sites/default/files/documentstore/passengerlists/1857/GRG35_48_1_57-1_Marion.pdf

Jamjar

[Jamjar]

His obit says he was a native of Redruth, it doesn’t say that Mary was, or that it was where he married, 2nd last column:

http://nla.gov.au/nla.news-article5727836

Jamjar

[rosie99]

Marriage June qtr 1853   
Johns    Mary Ann       
Moore    William       
Redruth    5c   465

The only Moore / Johns birth after this in Redruth is Mary Ann in 1854

[osprey]

My gggrandparents had 2 children, mmn on one birth certificate is Jones registered in Clifton, on the other is Johns registered Newport, Mon. It should have been Johns. Both parents from Chepstow, Mon.
It happens!

 
 

[NieuwFam]

Jamjar, The obit for William Moore does not mention the name of his widow as you say, or where she came from. I can find little else on her in South Australia other than she is buried in the same cemetery plot. She died seven years later but only her married name is mentioned.
The copy of the ships manifest you attached is interesting, thank you. The copy I have which is a transcript does however mention Mary Ann's name as Jones, see attached.

Chempat, I agree that it could simply be a matter of phonetics in how the name sounded to whoever wrote it down. But I would still like to see some hard evidence.

Thanks rosie99 and osprey for your contributions as well.