Here, in the Indian sub-continent, it is considered wrong for a Muslim woman to address her husband by his name. So she may not address him by his name like, say (assuming the man's name is Abdullah), "Ya Abdullah," though she may call him by his kunniyat like "Ya Abu Ammar" (assuming that their son's name is Ammar). Personally, I don't think there's anything wrong with a woman addressing her husband by his own name, rather than his kunniyat.
I assume that the Umm-ul-Momineen may have addressed the Messenger of Allah (SAWS) by his title and not his name owing to his status. Therefore, that leaves us with the practice of the Companions (RAA). Is there any proof for either argument from the Companions (RAA) of the Messenger of Allah (SAWS)?