The name Charlatan was my yahoo nickname (charlatanme) since 1990 when I was a young pup and loved the band The Charlatans http://www.thecharlatans.net/. So.. I know I hate to bust everyones bubble but it's not because I am a "charlatan" lol.
Ok, I used to date a guy whose last name was Fisher and all his friends called him Fishdog. His other friends were named similarly - last name Wolfson (wolfdog) and another guy who I can't remember his name was Freakdog.
Since I have red hair they named me reddog. And the 65 is the year I was born.