We were all set for DH to change his name to mine. He told the ILs just before the wedding and all hell broke loose. At that point they had 3 sons and 2 grandsons so it was hardly as if their name was going to die out.
So we spent 2 years each with our own name with no issues apart from comments from all sides of both families about what was the point of getting married if we were going to have different names.
Then with the first DC on the way the issue raised its head again because there was no way my child was having a different name to me. No internet back then, but I bought a book which explained that you could call your child whatever you liked - even a surname with no connection to either of you - but if you couldn't agree, and you were married, then the father's wishes took precedence. If unmarried, the mother's took precedence.
After what happened before I wasn't taking any chances and we agreed to all double-barrel. Hisname-Myname made a stupid phrase so we went with the other way. We went to a solicitor who told us she would be proud to take her husband's name (she was a Miss) and insisted on interviewing DH alone in case I'd coerced him
. It was farcical.
The Deed says "I take this surname for myself, my wife and future issue". I did not have to sign it, so officially I have never actually changed my name at all. Children all registered as Myname-Hisname.
After years of records being filed under different letters at the GP etc, the ILs sending cards to Mrs and Mrs Hisname and Miss Hisname, one day I overheard DH on the phone say "It's Mr Hername here" and realised that he is known at work as just my surname. He uses just my name when he is booking anything. The only time he uses both is if he is doing something with the bank or booking holidays that have to be the same as the passports.
Children now grown up. One is married. DIL took on full db surname, to my surprise, but has taken to calling herself by just DH's surname. DGC coming and DS says it will have full surname, so will wait and see.
DD only uses my name and was very angry in her teens when the ILs sent her things in the wrong name. That stopped them doing it for the rest of us. She says that if she ever gets married she will be Mumname-DHname.
I have not and will not interfere in what they choose to call themselves, as that will be entirely their decision, just as it was ours.