The Constitution, Article 13
“If any citizen of the United States shall accept, claim, receive or retain any title of nobility or honor, or shall, without the consent of Congress, accept and retain any present, pension, office, or emolument of any kind whatever, from any emperor, king, person, or foreign power, such person shall cease to be a citizen of the United States, and shall be incapable of holding any office of trust or profit under them, or either of them.”
bible references to titles:
Job 32:21-22 KJV
Let me not, I pray you, accept any man’s person, Neither let me give flattering titles unto man. For I know not to give flattering titles;
Matthew 23:9 ESV
And call no man your father on earth, for you have one Father, who is in heaven.
John 8:54
Jesus answered, If I honor myself, my honor is nothing: it is my Father that honors me [judges wish to be called honorable even though many are not]
Job 32:21
I will not show partiality to any man or use flattery toward any person.
Romans 2:11
11 For there is no respect of persons with God.
Matthew 23:8
But do not be called Rabbi (Teacher); for One is your Teacher, and you are all [equally] brothers.
Matthew 26:49
Going directly to Jesus, he said, “Greetings, Rabbi!” and kissed Him.