I recently came across this reference to a medieval Cailly. The year is the 14th of the reign of Edward I, which ran from 20 November 1285 to 19 November 1286. The place is North Repps near Cromer on the NE Norfolk coast.
“Roger de Cayly and Robert the groom (valettus) of Henry de Brom, being prosecuted at the suit of the bailiffs of this hundred, took sanctuary in the church of North Repps, and admitted themselves to be thieves.”
Henry de Brom belonged to quite an important East Anglian family.
I do not know how, if at all, Roger de Cayly fits into the Cailly tree, but the fact that he is recorded as ‘de Cayly’ suggests he does somehow – ‘de’ normally signifies a member of a landowning family. About 40 years earlier there are references to a Roger de Cailli/Caly at Heacham on the Wash, where the Cailly’s had long held land, but this is unlikely to be the same person. It looks the thieving Roger was one of the family’s black sheep. Or was this an episode in a quarrel between the Cailly family and neighbours? Such quarrels often led to what we would regard as criminal acts, as State records, manor court records and the Paston Letters show.
Source: Crown Plea Roll, Norfolk, North Erpingham Hundred, in Norfolk Antiquarian Miscellany, vol. 1, ed. Walter Rye, pub. A H Goose and Co, Norwich, 1883