Cn. Gellius Moneyer of the Roman Republic from 138 BC to 138 BC.
Gnaeus Gellius was one of the moneyers for the year 138 BC.

He was the author of a history of Rome from the earliest epoch, extending at least to the year 145 BC, as indicated by Censorinus.

He described the Rape of the Sabines in his second book; the reign of Titus Tatius in the third; and in the 33rd, dealing with the Second Punic War, the death of Postumius Albinus and the purpose to which his skull was applied by the Boii.

He was apparently both an accurate chronologer and a diligent investigator of ancient usages.
Cn. Gellius
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An AR Denarius struck 142 (138)BC in Rome
Obverse: head of Roma right wearing winged helmet, all within wreath X

Reverse: Mars and Nerio in quadriga right; Mars holding Nerio and shield CN·GEL ROMA

Diameter: -
Die Orientation: -
Weight: 3.9 g
Reverse depicts the abduction of Sabin goddes Nerio by Mars. Moneyer was most probably historian, author of a history of Rome from the earliest epoch extending at least to the year 145 BC.
Crawford 232/1, SRCV 109, RSC I Gellia 1