What is your name ?

In English , there are several phrases to ask your name ,like
What is your name?, May I have your name,please and so on.

All the phrases below are sentences which ask your name.

Anatano namae wa nan desuka ? : your ,name, what,is,? : What is your name?
no : makes possessive case, A no B : A's B
anata : you
anatano : your
namae : name
nan / nani : what
desu : is / are : "desu" makes the sentence end with affirmation.
ka : "?" : "ka" makes the sentence interrogative

Onamae wa ? : Your name?
o- : makes the word polite

Onamae wa nan to osshaimasuka . : May I have your name?
ossharu : say(polite)
(osshara-nai,osshari-masu,ossharu,ossharu-toki,osshareba,(osshare),(ossharou),osshatta)
onamae wa nan to osshaimasuka : name, what,say : May I have your name?

Dochirasama desuka. : Who are you?
dochira : which
sama / san : is usually attached to a name like "Mr" or "Mrs".
eg ; Tanaka sama : Mr/Ms Tanaka

Donata desuka. : Who are you?
donata: who(polite)

Dare desuka. : Who are you?
dare : who