Thank you for that... I appreciate the problems but my Grandmother told me the family changed the name from Johannsen before coming to England and John's father is also listed as John Johnson on his marriage certificate in 1843.
His date of birth was 30 June 1821 although in a statement to the Secretary of State regarding Naturalisation, he gave the year as 1822. He also says he came to England to reside in 1841.
All other papers regarding his Master's Certificates state his birth year as 1821.
Other researchers seem to think he was born in Copenhagen but I have not been very lucky with my research so far in that area. And that is the part of his life that is important to me. I know about his life in England and his family.
ANY help would be gratefully received!