Jonathan (or Jonathas, Italian Gionata; died July 1121), a member of a cadet branch of the Drengot family, was the Duke of Gaeta from 1113 until his death.
[2][3][4] After the death of Duke Andrew of Gaeta without heirs in 1113, the duchy escheated to Prince Robert I of Capua, who bestowed it on Jonathan and appointed Richard his regent.
[5] As a sign of Gaeta's semi-independence, between March[b] 1113 and July 1114 he and Richard issued charters dated to the joint-reign (1092–1118) of the Byzantine emperors Alexios I and John II.
[3] There are no Gaetan follari (copper coins) definitively attributable to the reign of Jonathan.
Specimens with the inscriptions IOAN and IOHS DVX may belong to him, but are more usually ascribed to John IV (991–1012).