tefilla - Mishebeirach for someone who doesn't want their mother's name used

Suppose someone really dislikes his mother and does not want to be known as (for example) "יוסף בן רחל". He's sick, and people wish to pray for him in a Mishebeirach.

Do his wishes have to be honored? And what is the alternative? יוסף בן שרה?

Answer

The Rabbi I consulted said that for the sake of shalom, Sara could be used.