My husband and I refer to our boy's lovingly as the "brat boy's". My dad has been calling me Brandy Brat for a long long time, so when I had kids, they were the "brat boy's"
My oldest son is named Mason, we call him Mace. When he was a baby, we called him Mason Man and little man.
Son # 2 is named Kennedy James, I did not want others to call him Kenny so I started to call him KJ and other's caught on, thankfully no one ever called him Kenny
As a baby my nick name for him was little poopers, because he had GI problems
His ped Immunologist and GI doctor were the only other people that also called him that name
Son # 3 is named Lincoln, we call him Link. When he was little he was called Linky,and Slinky Linly. I called him Sunshine and Mommy's sunshine because when he woke up he was alway's so happy to see me, I got the brightest smiles from him.
Son #4 is named Garrett. His nick name that my husband and I call him is Rhett. When he was born I called him Garrett the ferret, I would even sing a little song " Garrett the ferret ate all my carrots" and that is the name the family has stuck to calling him, he is sometimes just called ferret too.