Wikipedia
Mantri is a word of Sanskrit origin (meaning sage, i.e. the "person who thinks and says" in that language, cf. Mantra), and it is used for a variety of public offices, from fairly humble to ministerial in rank. The term was used in various Asian cultures and eventually was used by early European traders. The term also forms part of a number of compounds. It is the root of the English word mandarin, for a bureaucrat of the Chinese empire (though the word was never used by the Chinese themselves).
These are just a few examples of the use of this root in various political systems
Usage examples of "mantri".
It was an auspicious blue, the blue of brahman, and Dasaratha felt a stirring in his heart as he walked with his mahaguru and pradhan mantri toward the gates of his palace.
And off to one side, eyes goggling at this incredible turn of events, Pradhan Mantri Sumantra.
Even Pradhan Mantri Sumantra and Guru Vashishta stood by silently, unwilling to take either side in this clash of wills.
Even without hearing the words, Rama knew that the pradhan mantri was praying to the Holy Trinity to protect them all from the krodh of the great seer-mage.
The order to disarm had been given by Pradhan Mantri Sumantra after hearing the story of the near-riot on Raghuvamsha Avenue earlier that morning.
Vashishta and Sumantra were in the seal room when Mantri Jabali burst in.
Sumantra followed the guru in, then turned to see Mantri Jabali still standing outside the portal.
Of course, it was usually Pradhan Mantri Sumantra who did the actual applying, but he consulted with the maharaja.
Kausalya could answer, the doors swung open again and Guru Vashishta entered, followed by Pradhan Mantri Sumantra.
But to set your mind at rest, let me remind you that with your father incapacitated, the burden of the kingdom falls on the shoulders of Pradhan Mantri Sumantra, First Queen Kausalya-maa, and yourself.
Pradhan Mantri Sumantra saw Guru Vashishta levitating as he entered the yoga chamber.
Out of the corner of his eye, Dasaratha caught Pradhan Mantri Sumantra stealing a sideways glance.
Pradhan Mantri Sumantra stood and made a speech that was hugely popular on account of its being blessedly short, and then invited the maharaja to speak.
Guru Vashishta and Sumantra were in the seal room when Mantri Jabali burst in.
Before Kausalya could answer, the doors swung open again and Guru Vashishta entered, followed by Pradhan Mantri Sumantra.