Jérôme Groslot, Sieur de l’Isle (died 1622) was a French diplomat.
He returned to France in 1581 and George Buchanan, his former tutor, wrote to Theodore Beza on his behalf.
[3] Jérôme Groslot was sent to Scotland in April 1589 to advocate the marriage of James VI to Catherine de Bourbon, sister of Henry of Navarre.
[4] An English observer at the Scottish court Thomas Fowler wrote that François de Civille and Jérôme Groslot encouraged Edinburgh merchants who dealt with France to support the Navarre marriage.
[5] John Colville wrote to the Laird of Wemyss that James VI was set on the Danish marriage and l'Isle's efforts were likely to be in vain.