John+ Douglas
John+ was born about 1310.  He died  due to being murdered. about 1349.

 Agnes+ X
Agnes+ was born about 1315.

 James+ Douglas
James+ was born about 1342 in Dalkeith, Mid Lothian, Scotland.  He died in 1420 in Scotland.

 William Henry+ Douglas
William Henry+ was born about 1345 in Ralston, Renfrewshire, Scotland.