Alexandre Louis Lefebvre de Cérisy (14 November 1798 Paris - 1867 le Bouchevilliers, near Gisors was a French entomologist
After her husband's death, the Dowager Queen retired to Neaufles-Saint-Martin near Gisors in Normandy.
One of the first acts ordered by de Gisors in Portsmouth was the donation of land to the Augustinian canons of Southwick Priory so that they could build a chapel "to the glorious honour of the martyr Thomas of Canterbury, one time Archbishop, on (my) land which is called Sudewede, the island of Portsea", Thomas Becket having spent much time in Gisors.
In England, Henry promulgated the Saladin tithe to pay for the crusade; this was perhaps influenced by the 1183 tax in Jerusalem, which Joscius may have mentioned to him at Gisors.