I am the Third which sucks.
It is a family name from my dad's parternal grandmother. Middle name is because when my grandad was born there was complications and so named the doctor that saved both lives (my grandaddy and his mother) his last name was the middle name. Billy comes from a pet crow my granddaddy had. The crow was black billy and grandfather was white billy but just billy stuck. So he passed that down. I think Tristan a better name than mine.