The noun syngenēs (relative) in Bible

(Translation from NRSV for the New Testament and Brenton for the Septuagint with a few modifications for a more literal meaning)

Legend:
Blue color: syngenēs = general term for extended family and often appears in the phrase: relatives and friends
Red color: syngenēs = people of the same race, the same clan, the same tribe
Green color: syngenēs = ant or uncle
Pink color: syngenēs = parents, father or mother

Mark

6: 4Then Jesus said to them, "Prophets are not without honor, except in their hometown, and among their relatives (syngenēs), and in their own house."

Luke

1: 36And now, your relative (syngenēs) Elizabeth in her old age has also conceived a son; and this is the sixth month for her who was said to be barren.
1: 58Her neighbors and relatives (syngenēs) heard that the Lord had shown his great mercy to her, and they rejoiced with her.
2: 44Assuming that he was in the group of travelers, they went a day's journey. Then they started to look for him among their relatives (syngenēs) and friends.
14: 12He said also to the one who had invited him, "When you give a luncheon or a dinner, do not invite your friends or your brothers or your relatives (syngenēs) or rich neighbors, in case they may invite you in return, and you would be repaid.
21: 16You will be betrayed even by parents and brothers, by relatives (syngenēs) and friends; and they will put some of you to death.

John

18: 26One of the slaves of the high priest, a relative (syngenēs) of the man whose ear Peter had cut off, asked, "Did I not see you in the garden with him?"

Acts

10: 24The following day they came to Caesarea. Cornelius was expecting them and had called together his relatives (syngenēs) and close friends.

Epistle to Romans

9: 3For I could wish that I myself were accursed and cut off from Christ for the sake of my own people, my countrymen (syngenēs) according to the flesh.
16: 7Greet Andronicus and Junia, my relatives (syngenēs) who were in prison with me; they are prominent among the apostles, and they were in Christ before I was.
16: 11Greet my relative (syngenēs) Herodion. Greet those in the Lord who belong to the family of Narcissus.
16: 21Timothy, my co-worker, greets you; so do Lucius and Jason and Sosipater, my relatives (syngenēs).

Leveticus (LXX)

18: 14Thou shalt not uncover the nakedness of thy father's brother, and thou shalt not go in to his wife; for she is your ant (syngenēs).
20: 20Whosoever shall lie with ant (syngenēs), has uncovered the nakedness of his uncle (syngenēs): they shall die childless.
25: 45And of the sons of the sojourners that are among you, of these you shall buy and of their countrymen (syngenēs), all that shall be in your lands; let them be to you for a possession.

2 Samuel (LXX: 2 Kings)

3: 39And that I am this day a mere kinsman (syngenēs) of his, and as it were a subject; but these men the sons of Saruia are too hard for me: the Lord reward the evil-doer according to his wickedness.

Ezekiel (LXX)

22: 6 Behold, the princes of the house of Israel have conspired in thee each one with his kinsmen (syngenēs), that they might shed blood.

Greek Daniel (LXX)

13: 30So she came with her father and mother, her children, and all her relatives (syngenēs).
13: 63Therefore Chelcias and his wife praised God for their daughter Susanna, with Joacim her husband, and all their relatives (syngenēs), because there was no dishonesty found in her.

1 Esdras (LXX)

3: 7and he shall sit next to Darius because of his wisdom, and shall be called Darius's relative (syngenēs).
4: 42Then said the king unto him, Ask what thou wilt more than is appointed in the writings, and we will give it thee, because thou art found wisest; and thou shalt sit next me, and shalt be called my relative (syngenēs).

Tobit (LXX)

3: 15and that I never polluted my name, nor the name of my father, in the land of my captivity: I am the only daughter of my father, neither hath he any child to be his heir, neither any near relative (syngenēs), nor any son of his alive, to whom I may keep myself for a wife: my seven husbands are already dead; and why should I live? but if it please not thee that I should die, command some regard to be had of me, and pity taken of me, that I hear no more reproach.
6: 11the angel said to the young man, Brother, to day we shall lodge with Raguel, who is your relative (syngenēs); he also hath one only daughter, named Sara;

Sirach (LXX)

41: 22and to look upon an harlot; And to turn away thy face from thy countrymen (syngenēs);

1 Maccabees (LXX)

10: 89and sent him a buckle of gold, as the use is to be given to such as are of the king's parents (syngenēs): he gave him also Accaron with the borders thereof in possession.
11: 31We send you here a copy of the letter which we did write unto our relative (syngenēs) Lasthenes concerning you, that ye might see it.

2 Maccabees (LXX)

5: 6but Jason slew his own citizens without mercy, not considering that to get the day of them of his own nation would be a most unhappy day for him; but thinking they had been his enemies, and not his countrymen (syngenēs), whom he conquered.
8: 1Then Judas Maccabeus, and they that were with him, went privily into the towns, and called their countrymen (syngenēs) together, and took unto them all such as continued in the Jews' religion, and assembled about six thousand men.
11: 1Not long after this, Lysias the king's protector and relative (syngenēs), who also managed the affairs, took sore displeasure for the things that were done.
11: 35Whatsoever Lysias the king's relative (syngenēs) hath granted, therewith we also are well pleased.
12: 39And upon the day following, as the use had been, Judas and his company came to take up the bodies of them that were slain, and to bury them with their relatives (syngenēs) in their fathers' graves.
15: 18For the care that they took for their wives, and their children, their brethren, and relatives (syngenēs), was in least account with them: but the greatest and principal fear was for the holy temple.

3 Maccabees (LXX)

5: 39His parents (syngenēs), who were reclining with him, wondered at his instability, and thus expressed themselves:
5: 44Joyfully his friends broke up, together with his parents (syngenēs); and, trusting in his determination, arranged their forces in guard at the most convenient places of the city.
5: 49thought that they had come to the last moment of their lives, to the end of what they had tremblingly expected. They gave way, therefore, to lamentations and moans: they kissed each other: those who were relatives (syngenēs) hung about one another's necks: fathers about their sons, mothers their daughters: other women held their infants to their breasts, which drew what seemed their last milk.