i called my brother "****ie" when we were very little (we're 1 year, 10 months apart), but my dad made me quit it when i was about 5-6, so i've called him "brother" ever since. after i was grown, my grandfather called me by my middle name, "khristi". he then began to call me "christopher", then "christopher jones", then finally, i became "jonesy" and that stuck. he called me jonesy until he died 6 years ago, and i'd give ANYTHING to hear it one more time. he called my daughter "twinkle toes", which he shortened to "twinks", and she was twinks until his dying day.
ETA: sorry, if forgot about the filter.