DH and I were discussing that, should we have a boy, his MN would be 'Louis', in honor of my family and my maiden name. If we have a girl, however, we were tossing around the idea of using 'Katherine' (which i LOVE) as MN, in honor of DH's mom. Both my mom and his mom are very much alive and healthy (knock on wood!). How much do you worry about hurting one of the grandmother's feelings by picking the other grandmother's name? Would you not even cross that bridge?
eta; to add clarity