Yes, it is Jehovah's Witnesses

Robert M. Bowman has written:

'Jehovah's Witnesses' -- subject(s): Controversial literature, Jehovah's Witnesses

'Why you should believe in the Trinity' -- subject(s): Controversial literature, Jehovah's Witnesses, Trinity

'Understanding Jehovah's Witnesses' -- subject(s): Bible, Criticism, interpretation, Doctrines, History, Jehovah's Witnesses

Yes. Jehovah' s Witnesses are generally considered a Christian denomination and are classified as such by most authorities.

Jehovah's witnesses don't have flag but they have a logo.

yes, Jehovah Witnesses do get baptized