When we married both my husband and I kept our maiden names, him remaining Mr X and me - Ms Y. Our daughter's name is Miss Y-X.
When filling school applications we (obviously) used correct names for all of us, however, the school seems to be very confused and keeps calling my husband either Mr Y or Mr Y-X. At first, we giggled and asked them verbally to change it. Then we called them several times and wrote increasingly more aggressive emails. Yet, every couple of weeks we receive a new letter with a new version of our names, except for the correct one. The latest was the best - Mr and Mrs Firstname Y-X.
My husband used to laugh, but now he takes offence at paying large bills with a wrong name on them.
I am probably being unreasonable, but one would have thought that in the 21st century people should be able to deal with wives and husbands having different names?