Over the years, purely by chance, a number of the villains from my various books have had names starting with the letter B.
First there was Belgaroth, the undead Chaos Knight Lord and Big Bad, from my second Fighting Fantasy adventure gamebook Knights of Doom (which was written in 1994 and published in 1995). I was interested to find this entry about him here.
Then there was Bloodbones, the eponymous villain from my fourth FF gamebook - although Bloodbones was only his nickname (written in 1996, re-written in 2005 and finally published in 2006).
And then, in 2009, Balthasar Sturm, evil elementalist, came on the scene in my sixth FF adventure Stormslayer, and who bizarrely has his own Facebook page!
What is this thing with the letter B? I have no idea...