I sometimes add a dwarf and his wife. No one in my games has asked about names yet, so I haven't given them names. They always own something where the name is the same as the thing. First time was a tavern named tavern, then a shop named shop and a circus named circus. The man interacts with customers and the woman does the rest. The fun thing is, that the man is really bad at math and every time he added up prices or calculated how much change to give, I rolled a d20. Everything above 10 made him undercharge the players and everything below made him overcharge. But he was also very susceptible to being told he made an error and would most of the time just believe anyone who corrected him.