Daniel is mentioned in Ezekiel, the book of Daniel and the gospels of Matthew and Luke.

The name Daniel is also in 1 Chronicles, Ezra and Nehemiah but they are not the same Daniel as in the book of Daniel

In the book of Daniel, Daniel's friends were Shadrach, Meshach, and Abednego. They are first introduced along with Daniel in Daniel Chapter 1.

A. no but belteshazzar wrote a book about Meshach, shadrach, and abednego.

and the book is called Daniel in the old testament. Daniel 1:7.

hope this helps

Belshazzar (Book of Daniel, Chapter 5, v. 1)