draconian

From Latin Dracō (stem Dracōn-) plus the suffix -ian, itself from Ancient Greek Δράκων (Drákōn). It honors — or rather blames — Draco, an Athenian lawmaker remembered for the severity of his legal code.

The facts given don't trace a further shift in meaning beyond its origin in Draco's name.

The Greek root δράκων (drákōn) also means "dragon," and Latin dracō carries the same sense, so this word shares ancestry with English "dragon."