I haven't sent out the invitations with RSVPs yet, but I'm already running into some problems. There's going to be a number of people who have children with different last names, and while I've tried discretely asking the folks we've invited that if they plan on bringing their significant other and kids, to find out what the last names of the kids are so that we don't insult anyone by assuming it's the same as the parent. I've actually already run into this issue with someone in the bridal party that they're to embarassed to ask their S/O because there's an issue going on with the father and it's a sensitive topic I guess. So I have first names but not a last name. In the even that last names don't get provided, is there a way to label this for seating? The venue is requiring we have tent cards with the meals listed at the assigned tables. Is there an etiquette to this somehow? Like say for example, a guest is invited whose name is Jane Smith, and her kids are John and Joe, but they have different last names and I don't know what they are. How would I put this on their table seating? John, Guest of Jane Smith??? Do I just put John Smith anyway since a different last name wasn't provided?