Thread:Veenster7/@comment-26119612-20170517032041/@comment-26901681-20170517183358

I remember that part in "April Fools Rules." The parents only call the kids that when they are mad at them for something. It's most likely their middle name, but seeing how I haven't seen anything canon refer to their middle names as Marie (AFR is canon but didn't explicitly state that Marie is Lisa's middle name); I don't know if we can say that in the articles. It's possible that it's a nickname rather than a middle name.