What was a Latin term used for a leader in early Roman Christians

The term used for a leader is Pastor

The latin term used for leader in early Roman christians is PAPA (which means father)

Explanation:

Pope, the word comes from the latin word 'Papa' which means father. Pope is the head of vatican city. The catholic church considers him as the true successor of "Apostle Peter".

Additional Information:

Pope Mobile: Car of Pope

Mitre: His tall hat

Pallium: The cloth that he wears around the neck

Mode of election: The cardinal electors chooses the new Pope in a meeting called conclave (a room which may be locked). It needs the support of two third majority to elect the new Pope.