I am a descendant of the Honourable Duncan Robertson of Gilnock Hall Jamaica. During my research, I have discovered that he had six illegitimate children all born to Ann Henegan described in records as a 'free mulatto' or 'free person of colour'. The children were all baptised,
Caroline Robertson born 1805
Alexander Robertson born 1807
Duncan Suttman Robertson born 1810
...? Graham Robertson born 1813
Isabella Robertson born 1815
Jane Ann Robertson born 1818
He later had five legitimate sons with his wife, Elizabeth Smith who he married in 1834; Duncan Graham, Robert Henry, Peter Dundas, Francis MacDonald and James Alexander.
I have been able to trace these legitimate children, but know nothing more about his earlier family. Can anyone offer any help?