The name of Judas was not changed in the bible.
There are a total of approximately 17 names changed in the Bible. These names where either changed by God or other people of Authority.
No.
Jacob from the bible but his name was changed to israel
Surnames weren't used at this time. Jacob's name was changed to 'Israel'.
Saul became Paul
First it was Saul when he was unsaved, it changed to Paul later.
In some copies of the Bible, in the introduction, it tells you that the name of God YHWH has been taken out of the Bible. If you look in old versions of the King James Bible it still has the name of God, YHWH or Jehovah, in four places. For instance, Psalms 83:18, and Exodus 6:3. But most Bible translations are taking it out and replacing it with 'Lord.' The Bible replaces the 7,000 times God's name Jehovah was there.
In Acts we read he was Marys son , then named John but changed his name to Mark.
Sara is not mentioned in the Bible. Sarah is probably who you are asking about. The name Sarah is first mentioned in Genesis 17:15 when God changed Sarai's name to Sarah (after he changed Abram's name to Abraham). Sarai is first mentioned in Genesis 11:29 as Abram's wife.
According to the Bible in Genesis 17:15 God said to Abraham... (Changed her name from Sarai to "Sarah")
It is believed that God's unspeakable name is YHVH. Many scholars and bible translators changed it to Yahweh in order to be more readable.