Thanks
John McLean was born Iverkeithney Fifeshire don't have his parents yet but 1851 UK Census has a John McLean aged 7 living in Govan Lanarkshire with Grandmother Janet Crawford.
Elizabeth Burnside or Eliza as she seemed to be called was born Lismahagow Lanarkshire, her parents were George Burnside and Grace Miller.
That would definitely be them in the 1870 US Census as the 1881 UK Census has them living in Glasgow. His occupation is Engine Smith and daughter Jean aged 9 was born New York State Dunkirk
Can't believe that another John McLean and Elizabeth Burnside got married 1870 in New York!