Mnason

Mnason, from a Greek name pronounced mnaw-sown, was a highly-regarded Christian from Cyprus who was living in Jerusalem at the time that the apostle Paul returned from his Third Missionary Journey. Mnason is referred to as "old" in the verse quote below in reference to him having been a Christian for a long time (very likely longer than Paul - see Was Paul Among Them?), not necessarily his age; other translations use "early" (RSV). Paul was to lodge at Mnason's house while in Jerusalem:

"^21:15 And after those days we took up our carriages, and went up to Jerusalem. ^21:16 There went with us also certain of the disciples of Caesarea, and brought with them one Mnason of Cyprus, an old disciple, with whom we should lodge. ^21:17 And when we were come to Jerusalem, the brethren received us gladly." (Acts 21:15-17 KJV)

"When we were come to Jerusalem, the brethren received us gladly"

Perhaps the reason that Paul was given to stay with a deeply-rooted Christian who, like Paul, could not be intimidated by anyone was because with Paul was coming trouble - as Paul and the others were given in prophecy before the apostle even got to Jerusalem:

"^21:10 And as we tarried there many days, there came down from Judaea a certain prophet, named Agabus. ^21:11 And when he was come unto us, he took Paul's girdle, and bound his own hands and feet, and said, Thus saith The Holy Ghost, So shall the Jews at Jerusalem bind the man that owneth this girdle, and shall deliver him into the hands of the Gentiles.

^21:12 And when we heard these things, both we, and they of that place, besought him not to go up to Jerusalem.

^21:13 Then Paul answered, What mean ye to weep and to break mine heart? for I am ready not to be bound only, but also to die at Jerusalem for the name of the Lord Jesus. ^21:14 And when he would not be persuaded, we ceased, saying, The will of the Lord be done." (Acts 21:10-14 KJV)

Despite the danger from those who couldn't, or wouldn't yet see, many other Jews of the city did warmly welcome Paul.

"^21:17 And when we were come to Jerusalem, the brethren received us gladly. ^21:18 And the day following Paul went in with us unto James; and all the elders were present. ^21:19 And when he had saluted them, he declared particularly what things God had wrought among the Gentiles by his ministry." (Acts 21:17-19 KJV)

It wasn't long however before the prophecy of Paul's being taken prisoner was fulfilled. Mnason's houseguest enjoyed a very brief stay.

"^21:27 And when the seven days were almost ended, the Jews which were of Asia, when they saw him in the temple, stirred up all the people, and laid hands on him, ^21:28 Crying out, Men of Israel, help: This is the man, that teacheth all men every where against the people, and the law, and this place: and further brought Greeks also into the temple, and hath polluted this holy place. ^21:29 For they had seen before with him in the city Trophimus an Ephesian, whom they supposed that Paul had brought into the temple.

^21:30 And all the city was moved, and the people ran together: and they took Paul, and drew him out of the temple: and forthwith the doors were shut. ^21:31 And as they went about to kill him, tidings came unto the chief captain of the band, that all Jerusalem was in an uproar. ^21:32 Who immediately took soldiers and centurions, and ran down unto them: and when they saw the chief captain and the soldiers, they left beating of Paul.

^21:33 Then the chief captain came near, and took him, and commanded him to be bound with two chains; and demanded who he was, and what he had done. ^21:34 And some cried one thing, some another, among the multitude: and when he could not know the certainty for the tumult, he commanded him to be carried into the castle. ^21:35 And when he came upon the stairs, so it was, that he was borne of the soldiers for the violence of the people. ^21:36 For the multitude of the people followed after, crying, Away with him." (Acts 21:27-36 KJV)

Fact Finder: What civil right did Paul claim when he was arrested by the Jerusalem mob?
See Paul The Roman Citizen