chief among the publicans

Concise Bible Dictionary:

The persons who farmed the taxes levied by the Romans, a certain sum being payable for each district. These then farmed out smaller portions to others, or engaged them to collect the money. The whole system was bad, and was capable of abuse by the collectors demanding more than they should. The counsel given by John the Baptist to the Publicans was: “Exact no more than that which is appointed you” (Luke 3:12-1312Then came also publicans to be baptized, and said unto him, Master, what shall we do? 13And he said unto them, Exact no more than that which is appointed you. (Luke 3:12‑13)). Zacchaeus would appear to have been a just and liberal man; he speaks of restoring money taken “by false accusation”: being “the chief among the publicans,” he remedied such things as were under his control.
The obligation to pay taxes to the Romans was very galling to the Jews, and those engaged in collecting them were accounted unworthy of any respect, hence “publicans and sinners” are often classed together; the Lord was derided by the religious people for entering their houses: they mockingly called Him “a friend of publicans and sinners.” But God’s grace was for all, and Matthew was called from his office of publican to be one of the apostles (Matt. 5:46-4746For if ye love them which love you, what reward have ye? do not even the publicans the same? 47And if ye salute your brethren only, what do ye more than others? do not even the publicans so? (Matthew 5:46‑47); Matt. 10:33Philip, and Bartholomew; Thomas, and Matthew the publican; James the son of Alpheus, and Lebbeus, whose surname was Thaddeus; (Matthew 10:3); Mark 2:15-1615And it came to pass, that, as Jesus sat at meat in his house, many publicans and sinners sat also together with Jesus and his disciples: for there were many, and they followed him. 16And when the scribes and Pharisees saw him eat with publicans and sinners, they said unto his disciples, How is it that he eateth and drinketh with publicans and sinners? (Mark 2:15‑16); Luke 5:27-3027And after these things he went forth, and saw a publican, named Levi, sitting at the receipt of custom: and he said unto him, Follow me. 28And he left all, rose up, and followed him. 29And Levi made him a great feast in his own house: and there was a great company of publicans and of others that sat down with them. 30But their scribes and Pharisees murmured against his disciples, saying, Why do ye eat and drink with publicans and sinners? (Luke 5:27‑30); Luke 18:10-1310Two men went up into the temple to pray; the one a Pharisee, and the other a publican. 11The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners, unjust, adulterers, or even as this publican. 12I fast twice in the week, I give tithes of all that I possess. 13And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner. (Luke 18:10‑13)).

Strong’s Dictionary of Greek Words:

Number:
754 (find all occurrences in KJV Bible)
Greek:
ἀρχιτελώνης
Transliteration:
architelones
Phonic:
ar-khee-tel-o’-nace
Meaning:
from 746 and 5057; a principle tax-gatherer
KJV Usage:
chief among the publicans