Strong's G5076 — τετράρχης (noun)
tetrarches (tet-rar'-khace) n.
1. the ruler of a fourth part of a country ("tetrarch")
[from G5064 and G757]
KJV: tetrarch 
Root(s): G5064, G757 
Hebrew root: ἄρχω
Occurrences: 4