Life Themison the Historian was a Greek author active in the 1st century CE. His name distinguishes him from the more prominent 1st-century BCE physician Themison of Laodicea. No biographical details survive, indicating he was a minor or fragmentarily attested figure.

He is known solely as the author of a lost work titled On the Jews. This work survives in a single fragment preserved by the 6th-century CE lexicographer Stephanus of Byzantium in his Ethnica, which mentions the city of Gaza.

Themison’s work places him within the Greco-Roman tradition of ethnographic writing about Judea. His sole surviving citation provides the only direct evidence of his existence, making him a minor source for ancient historiography and geography.