Hi Brian I am an Aussie Calderwood (married to one anyway!!) My Family Tree is as follows:-
John Calderwood married Isobel Locke.They had five children:-Robert 1784 Isobel 1786 Alexander 1788 (my line) William 1789 Agnes 1790
Alexander married Mary Strachan.They had three children. John born 1812 married Mary Baird (twin) Alexander b. 1814 - married Mary Sleigh. (twin) David b. 1814
John I believe remained in Scotland but some of his children migrated to Canada and USA. Alexander migrated to Australia in 1839 where he met and married Mary Sleigh who had migrated in 1838. David migrated to the USA in 1849. (I have no more information on him.)
Alexander and Mary had nine children. Alexander b.1843 d.1853(9yrs 9mths) Grace b.1846 d.1928 David b. 1848 d.1849 Mary b. 1849 d. 1850 Christina b.1850 d. 1928 Alexander(2) b.1854 d.1949 Annie b.1857 d.1939 John b. 1858 d. 1936 Elizabeth b. 1861 d. 1939.
My line continues through Alexander (2).
Is this of any help to you or are from a completely different line.If you are I would be interested in your family tree.Rosalie Calderwood