It's a known bug - I don't know if it has been fixed in the dev builds or not, though. You can edit the save file to fix the problem, though it takes a bit of searching. To fix a missing name, in the game, find the name of the first girl in the brothel, and then find her in the save file. There should be a blank line 9 lines or so above her entry in the file - this is where the brothel name goes (the following line should have 6 numbers, and they are probably all 0's). If the brothel is empty, search for the name of the last girl in the list of the previous brothel, then find the blank line after her entry. If the brothel was just purchased and there are no girls in it yet, it's entry will be at the bottom of the save file, prior to the list of script files.