Yes John Anderson is my Great, Great Grandfather.
I have a birth from the free BMD that is John Anderson Dec 1865 Durham. His marriage cert has Usworth listed as his birthplace.
I too have the 1881 census where he was boarding with Anne Swan as a 16 year old (assuming it's him) and born in Usworth.
There is also another possible 1881 census with the household of
William S Anderson 41
Mary A Anderson 48
John E Anderson 16
Mary Jane Anderson 13
Willaim T Anderson 10
Alice A Anderson 8
Jane Armitage (wife's mother) 79
Except Mary's age doesn't fit and neother does her mother's name. But i've kept it just incase those things are wrong.
On the LDS there is a marriage between William Anderson and Mary Simson April 18th 1861 Central District, Glasgow, Lanark Scotland. But I think that's the only one I could find.
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The family connections are that John Anderson is my great great grandfather, he married my great great grandmother Hannah Harland.
John's parents are William Anderson and Mary Simpson and Hannah's parents are Thomas Harland and Dorothy Simpson. As far as I can tell they are all from Durham.
John and Hannah's marriage cert has both the father's occupations as miners.
John and Hannah were married in Australia in 1889. He was recorded as being 24, while she was 16.
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From the free BDM is have a birth of Hannah Harland in Sep 1872 in Durham.
Her marriage cert has her birthplace listed as Tuddhoe Village, County Durham.
I also have a marriage of Thomas Harland and Dorothy Simpson in Sep 1869 in Auckland, Durham.
Also when you found the Dorothy Ann on the LDS, I must have had that recorded before as well, because I have come across a census that has Thomas Harland married to an Ann Harland and daughter Hannah, age 3 (plus son John, other daughter Ann and border George Clewes). I suppose she could be eluding us by going by her second name. Or it could be a different person.
Thomas, Dorothy and Hannah all died in Australia. Thomas and Dorothy were the witnesses on Hannah and John's marriage cert in 1889 so they must have been in Australia by then.