Since the historical sources do not give a clear answer, it is just an educated guess that the grenadiers of the Royal Écossois wore the personal tartan of Lord
John Drummond (1714 - 1747), but it seems quite obvious.
The Royal Écossois Tartan is a reconstruction variant of the personal tartan of Lord John Drummond, Colonel of the Régiment Royal Écossois (1744 - 1763), shown in a
painting which was painted by the Italian court painter Domenico Duprà in 1739.The portrait of Lord John Drummond, which is in the National Galleries of Scotland, served as the inspiration
for R.L. Heil who reconstructed the Lord John Drummond Tartan in 2013.
We proudly adopted the tartan of Lord John Drummond as the regimental tartan for the portrayal of the Royal Écossois.