QUOTE
If the lady changes her last name after getting married to the husband's, what's the norm for the middle name then here in the US?
I'd say there isn't really a "norm" - you can do whatever you want for the most part.
1). Keep middle name the way it was.
2). Use last name as middle name.
3). Hypenate middle name with previous last name (e.g First Patro-OldLast NewLast)
4). Drop the middle name entirely
5). Make something up (not legal in all states)
For what it's worth - we had a little middle-name hassle at the DMV. When she got her original license (before we got married), they refused to put her middle name on it because the I-94 didn't have it on there. It didn't seem to matter that the I-94 simply didn't have a place for a middle name. It also didn't seem to matter that the social security office correctly used her middle name either. So, her first license had only her first name and (old) last name.
After we got married, we went back to the DMV with the marriage certificate, which clearly showed her full name before and after getting married. This LEGAL DOCUMENT clearly indicated her LEGAL MIDDLE NAME, but they still refused to accept it - stating they would only change the last name as a result of marriage - and since, as far as they were concerned, she didn't have a middle name before getting married, she couldn't have one afterwards either.
Several months later, after getting her permanent resident card, we went back to the DMV because she needed to add a motorcycle endorsement to her license. We went through the same business as before, and they refused to accept the marriage certificate as evidence of middle name (which is completely illegal), and they insisted she had no middle name (it's on her passport, but that part is in Cyrillic, so they will not accept it). They refused to accept the translated birth certificate either, although I can't remember why. So, finally, we asked to see a supervisor, and then magically, the dumbass clerk was willing to accept the middle name off her PR card. Ugh!!! So, at least, her name is the same on all of her U.S. documents.
People are morons.
Cheers!
AKDiver