Verb (5-dan, る, transitive)
1. to give one's name (as); to introduce oneself (as)
名乗る必要はないだろう。There is no need to give your name.
2. to claim to be; to call oneself; to wear the title of
彼は本当に王子と名乗ったのか？Did he really claim to be a prince?
3. to reveal oneself (as); to admit to being
できるならここで、私が母だと名乗りたかった。If I could, I would have liked to reveal right here that I was her mother.
Verb (5-dan, る, transitive)
4. to adopt as one's name; to take (a name)
うん、これからはそう名乗ろう。Yeah, from now on I'll go by that name.
Archaic
Verb (5-dan, る, intransitive)
5. to call out the goods one is selling