Help to establish the Drysdale name and decendents after Thomas Douglas died in 1503

[Christopher Duncan Drysdale]

Hello From Australia,

I have established lineage back to Jhone Drysdale born abt 1560 in Aloa clackmannan he may have been an illegitimate son of 

Sir Archibald 1st Earl of Glenbervie Drysdale (Douglass) 8th Earl o...

B:7 Sept 1503 Glenbervie, Aberdeenshire, Scotland

D:29 September 1570 Buried Glenbervie Cemetary Kincardinshire.

I am trying to establish the connection to Thomas Douglas who died in early may 1503 in the parish of Dryfsdale near Lockerbie and his three sons Thomas, William and James who on 20th May 1503 went to battle with the neighbouring Johnstones who were trying to divert a watercourse. 14 of 20 Johnstones died and the family fled to the shot of Haugh in Dollar and changed their names to DRYSDALE. I can find no records of Marriages and issue for the three sons nor can I trace the father Thomas Douglas other than a grave 12th May 1503 in Dryfsdale Stirling. 

I have established a large tree on ancestry being Christopher Drysdale Family tree but have a gaping hole from Thomas back and the three sons going forward.

Any help please.

Chris Drysdale Camden NSW Australia

[Russell Lynn Drysdale]

I would suggest to read any number of Johnstone histories available  online - look at the enemies records . 

[William Douglas]

There are some family histories here:
https://www.douglashistory.co.uk/history/Septs/drysdale.html 

And a couple of hundred Drysdales are listed here:
https://www.douglashistory.co.uk/famgen/search.php?mylastname=drysd...   Make sure that you get the full link, ending with page=1.

William