||My Satmar cousin tells me that they name the first baby what the mother wants, and the second baby what the father wants.
In our Sephardic family the first son is for father's father,the second son is for mothers father,the first daughter is for father's mother, the second daughter is for mother's mother, after that it is up for grabs.
By the time you get the baby out, Thank Hashem that the baby and the mother are healthy and everything is all right, and look at the tremendous miracle that this new person is, the right name for the baby will seem obvious. (Parents have nevua when the name their children).
Meanwhile, tell the whole family that you are thinking of naming the baby "Elvis" (whether a boy OR a girl). Say it with a straight face and no one will ask you again.