Board Thread:General Discussion/@comment-28189972-20170228051259/@comment-30530552-20170426010201

I hear the 2 terms used interchangably, so to me, it's not that uncommon. Perhaps it just depends on the context, though. When talking to me, my parents refer to the other by "mom" or "dad" when the other is around or nearby but I still sometimes hear their given name, whereas if they're talking directly to each other it's usually their given names. If one is far away from the other [not in the house, in another place or something] the terms are used about equally.