The question is not clear. Here are two answers.
As written the answer is ¿"Eres Miguel hermano"?
If you meant "are you Michael's brother", the answer is ¿"Eres hermano de Miguel"?
Hermano is brother in Spanish
Miguel
'hermano' is the usual word for brother
You could say "Se llama Michael" or "Su nombre es Michael".
el hermano
Para Miguel
Hermano. Sister is Hermana
cualquier hermano!
hermano chocolate
hermano feo
te amo Michael Jackson
The language is called Spanish, and the word for brother is hermano.