The scripture gives a clear picture of who John the Baptizer is
His mother was from the tribe of Judah (the kings tribe) her name was Elizabeth and that she was the cousin of the Mary (the mother of Jesus who’s known as the Messiah)
Elizabeth was married to a Levite (the tribe of the Jewish high priests = descendant of Aaron brother of Moses) and both were old and they did not have a hope of having a child.
Luke 1:5-25 In the time of Herod king of Judea there was a priest named Zechariah, who belonged to the priestly division of Abijah; his wife Elizabeth was also a descendant of Aaron. Both of them were righteous in the sight of God, observing all the Lord’s commands and decrees blamelessly. But they were childless because Elizabeth was not able to conceive, and they were both very old. Once when Zechariah’s division was on duty and he was serving as priest before God, he was chosen by lot, according to the custom of the priesthood, to go into the temple of the Lord and burn incense. And when the time for the burning of incense came, all the assembled worshipers were praying outside. Then an angel of the Lord appeared to him, standing at the right side of the altar of incense. When Zechariah saw him, he was startled and was gripped with fear. But the angel said to him: “Do not be afraid, Zechariah; your prayer has been heard. Your wife Elizabeth will bear you a son, and you are to call him John. He will be a joy and delight to you, and many will rejoice because of his birth, for he will be great in the sight of the Lord. He is never to take wine or other fermented drink, and he will be filled with the Holy Spirit even before he is born. He will bring back many of the people of Israel to the Lord their God. And he will go on before the Lord, in the spirit and power of Elijah, to turn the hearts of the parents to their children and the disobedient to the wisdom of the righteous—to make ready a people prepared for the Lord.” Zechariah asked the angel, “How can I be sure of this? I am an old man and my wife is well along in years.”The angel said to him, “I am Gabriel. I stand in the presence of God, and I have been sent to speak to you and to tell you this good news. And now you will be silent and not able to speak until the day this happens, because you did not believe my words, which will come true at their appointed time.”Meanwhile, the people were waiting for Zechariah and wondering why he stayed so long in the temple. When he came out, he could not speak to them. They realized he had seen a vision in the temple, for he kept making signs to them but remained unable to speak. When his time of service was completed, he returned home. After this his wife Elizabeth became pregnant and for five months remained in seclusion. “The Lord has done this for me,” she said. “In these days he has shown his favor and taken away my disgrace among the people.”
So what does the title the Baptizer/Baptist mean.
In the middle east there is a group of people called the Sabaean-Mandean the word Sabae means baptist or the one who is immersed under-water
The name can be related to few biblical passages starting at Gen 10:7 And the sons of Cush: Seba and Havilah and Sabtah and Raamah and Sabteca; and the sons of Raamah: Sheba and Dedan.
In Job 1 13One day when Job’s sons and daughters were feasting and drinking wine at the oldest brother’s house, 14a messenger came to Job and said, “The oxen were plowing and the donkeys were grazing nearby, 15and the Sabeans attacked and made off with them. They put the servants to the sword, and I am the only one who has escaped to tell you!”
1Ch 1:9 And the sons of Cush: Seba and Havilah and Sabta and Raama and Sabteca. And the sons of Raamah: Sheba and Dedan.
Eze 27:22 The traders of Sheba and Raamah did trade with you; they gave the best of all sorts of spices and all sorts of stones of great price and gold for your goods.
Isa 60:6 You will be full of camel-trains, even the young camels of Midian and Ephah; all from Sheba will come, with gold and spices, giving word of the great acts of the Lord.
Psa 72:1-20 Of Solomon. Give the king your authority, O God, and your righteousness to the king’s son. May he be a judge of your people in righteousness, and make true decisions for the poor. May the mountains give peace to the people, and the hills righteousness. May he be a judge of the poor among the people, may he give salvation to the children of those who are in need; by him let the violent be crushed. May his life go on as long as the sun and moon, through all generations. May he come down like rain on the cut grass; like showers watering the earth. In his days may the upright do well, living in peace as long as there is a moon in heaven. Let his kingdom be from sea to sea, from the River to the ends of the earth. Let those who are against him go down before him; and let his haters be low in the dust. Let the kings of Tarshish and of the islands come back with offerings; let the kings of Sheba and Seba give of their stores. Yes, let all kings go down before him; let all nations be his servants. For he will be a saviour to the poor in answer to his cry; and to him who is in need, without a helper. He will have pity on the poor, and be the saviour of those who are in need. He will keep their souls free from evil designs and violent attacks; and their blood will be of value in his eyes. May he have long life, and may gold from Sheba be given to him: may prayers be made for him at all times; may blessings be on him every day. May there be wide-stretching fields of grain in the land, shaking on the top of the mountains, full of fruit like Lebanon: may its stems be unnumbered like the grass of the earth. May his name go on for ever, as long as the sun: may men be blessing themselves by him; may all nations be blessing his name. Praise be to the Lord God, the God of Israel, the only doer of wonders. Praise to the glory of his noble name for ever; let all the earth be full of his glory. So be it, So be it. The prayers of David, the son of Jesse, are ended. A Psalm. Of Asaph.
So John is his first name and the Baptist is the sect of Jews, just as Jesus called Jesus the Nazarene or Jesus the Galilaean (defining a new sect of Judaism) the name Nazarene refers to place but also a sect that is relevant to that place where that sect started.
In acts 24:5 “We have found this man to be a troublemaker, stirring up riots among the Jews all over the world. He is a ringleader of the Nazarene sect and even tried to desecrate the temple; so we seized him. (this refers to Paul being of the sect of Judaism called the Nazarenes because Jesus started his ministry or He is from city Nazareth in the providence of Galilee)