any one can help me ?:-)
what do you say in german for
1.what is your name ?
2.may i know your name ?
3.by what name you are called ?

Question

any one can help me ?:-)
what do you say in german for 
1.what is your name ?
2.may i know your name ?
3.by what name you are called ?

Answer

Yes, we would say
Ja, wir würden sagen
 "Wie heißt du?/Wie heißen sie?"

2. Dürfte ich sie um ihren Namen bitten? (May I ask your name, please?)
(very formal/polite)
(sehr formell/höflich)

3. Wie wirst du genannt?/Wie werden sie genannt? (nennen)
(not literally translatated, very complicated, better don't use this)
(nicht wörtlich übersetzt, sehr kompliziert/umständlich, besser nicht benutzen)

Answer

1. Wie ist dein/ihr Name?
2. Darf ich deinen/ihren Namen wissen?
3. Mit welchem Namen ruft man dich/sie?

In German you would use "Wie heißt du?" / "Wie heißen Sie?" rather than any of those above.

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