When I got legally married to my ex, I took his name hyphenated with mine so that I could have a name connection to our grandkids who we were raising. It really did make it a LOT easier -- people just don't question your connection when you have the same last name.
A few tips for those who are considering it:
-- if you get legally married in a state that allows legal marriage, you can get your name changed at Social Security even if your state does not honor that marriage
-- whether or not your name is changed with social security doesn't mean squat if your local laws do not recognize your marriage: Some local laws only require a ss name change to then get your driver's license and other stuff changed, others refuse to honor it. Interestingly, spouse and I were both able to get our drivers' licenses changed while our state still considered our marriage illegal, probably because we went separately and we both have names that could possibly be used for someone of the other gender (spouse's far less so, but considering that he has a spanish last name, they probably assumed that any country that might name their son Jesus might also name him _____). But other same sex couples were turned away.
-- IF you are turned away from getting your DL changed and are told that you need a court order, after you have your SS name changed, fight it up through the state government. Several couples were able to get the state to PAY for the costs of getting their court-ordered name change.
-- Do NOT assume that you know the rules for a name change based on old information or the info from another state: Every state has different laws and procedures.
Fortunately, when my state finally started recognizing out of state marriages as civil unions, they also made it so that we can use the local courts to get legally divorced, and made it so that name changes can be requested with a marriage OR divorce... Since I won't be allowed to maintain any legal relationship with the kids (other than grandma with zero legal rights), I'm taking my own name back.
