Who gets my brothers house, he died last month his wife is dead and they have no child,3of us are alive and 1 other sister is dead do her child share

Under NY laws of intestacy your deceased sister's share would be divided among her children. Depending on where the house is located, you may be able to have a title company insure title and you could have an attorney transfer the property using an affidavit of heirship.  Otherwise you would have to administer your brother's estate. There are some variable you did not mention (such as are your parents alive), and you should consult an attorney familiar with estate administration and real estate.