Roman legion
The Legio XXII Deiotariana, a Roman legion, traced its lineage back to Deiotarus. It was originally part of the Galatian Army, and the equivalent of three legions. After suffering a defeat it was consolidated into a single legion, and functioned as an informal Roman legion under Julius Caesar until Deiotarus' death, at which point it was incorporated into the Roman Army with its former king as its namesake.