Byzantine nobles
After Alexios I Komnenos (r. 1081 – 1118) created the new title of sebastokrator for his brother Isaac Komnenos, caesar fell to second in the court hierarchy of titles and ceased to be used to designate potential heirs of the emperor. Alexios' grandson Manuel I Komnenos (r. 1143 – 1180) further devalued the title after bestowing the title of despotes upon his son-in-law and heir Béla-Alexios, demoting caesar to third place where it would remain until the Fall of Constantinople nearly three hundred years later.
Nikephoros Bryennios the Younger, named by his father-in-law Alexios I
Nikephoros Melissenos, named in 1080 by Alexios I
Isaac Komnenos, named in 1104 by his father Alexios I
John Rogerios Dalassenos, named c. 1130 by his father-in-law John II
Renier of Montferrat, named in 1180 by his father-in-law Manuel I
John Kantakouzenos, named in 1186 by Isaac II
Conrad of Montferrat, named in 1187 by his father-in-law Isaac II
Manuel Maurozomes, named c. 1200 by Alexios III
Leo Gabalas, named by Theodore I Laskaris (r. 1205–1221)
Constantine Palaiologos, named in 1259 by his brother Michael VIII
Alexios Strategopoulos, named in 1259 by Michael VIII
Roger de Flor, leader of the Catalan Company, named in 1304 by Andronikos II
John Palaiologos, named in 1326 by his uncle Andronikos II
A number of foreign rulers were given the title of caesar as recognition of the emperor's authority whilst continuing to remain independent rulers.
Tervel, khan of the Bulgars, named in 705 by Justinian II
George II of Georgia, named in 1081 by his brother-in-law Nikephoros III
Hrelja, likely named by John VI Kantakouzenos (r. 1347–1354)