Duncan (unknown) 
John Thomas
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| Duncan (unknown) |
| John Thomas
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Duncan Dicson, barony of Symington
abt 1275, South Lanarkshire Scotland - ??
(unknown)
?? - ??
Married: ?? - ??
John Dicson (Diksson) (Dixon)
1303 - ??
Thomas Dicson
abt 1382, South Lanarkshire Scotland - ??