A long shot but hope this will be of interest.
Catherine JOHNSON 1817 24 F Lerwick Shetland (1841 Census)
Laurence JOHNSON 1838 3 M Unst Shetland (1841 Census)
Laurence JOHNSON 1838 13 M Shetland Shetland (1851 Census)
(spellings often depended on what the enumerators thought they heard etc)
The Shetland Islands had historic connections with Denmark...
Merchant Navy Seamen 1835-1941, on FMP, gives several William Johnson's inc
JOHNSON William 1813 Copenhagen Denmark
JOHNSON William 1819 Yell Shetland Islands
JOHNSON William 1815 Lerwick Shetland Islandshttp://www.genuki.org.uk/big/sct/SHI/http://www.ancestralscotland.com/explore/regions-counties/sh...http://shetlopedia.com/Shetlandhttp://www.nationalarchives.gov.uk/records/looking-for-perso...
(states that many people called themselves naturalised British Subjects in census when they weren't)
Kiel Records -
Rentamt des Kirchenkreises Kiel
24159 Kiel, GERMANY Good luck.