Thomas Barclay (c. 1570–1632) was a Scottish jurist, professor at Toulouse and Poitiers.
[1] Barclay was a native of Aberdeen, but as a young man he studied humane letters and philosophy at Bordeaux.
He was called to preside over the Collège de l'Esquile [fr] at Toulouse, where according to Thomas Dempster, he served his first literary campaign, under Balfour.
Here Barclay concentrated on law; and accepted the offer of a regius professorship at Poitiers.
His reputation procured a recall to Toulouse, where he was still living when Dempster drew up his Historia Ecclesiastica about 1620.