Where does “κόνσουλος” come from?

κόνσουλος (Byzantine Greek) comes from Latin cōnsul, from Latin consulere — second-person singular future passive indicative...

Ancestry of “κόνσουλος”, step by step

Step	Language	Word	Meaning
1	Latin	cōnsul	consul: either of the two highest-ranking officials of the Roman republic, elected annually
2	Latin	consulere	second-person singular future passive indicative...