Need Urgent Help On A Certain Unknown Demon! Options

A demon by the name of "Dibock" (that's how it's pronounced try also deebak, debak,dibok,debock). Please help on this one. Very important.

This was before I started the evocation business, I want to note that my grandfather was examined by an RCC priest for posession (he only found out a long time later, it's complicated, basically it was part of his life for a long time and he just lived with it until his old age when he managed to expel the thing from himself through prayer and saintly living for Jesus Christ). I also want to note that I believe these demons have legal authority from God to do what they want since I meddle in the occult, I just don't want this to affect my family, it's *MY* problem. Therefore I'm attempting to gather information on this demon and assess my options...... this is serious since I believe this thing has been around for a LONG time, and it has something to do with the family for the above noted reasons. My guess is my great-grandfather or somebody else did something they weren't supposed to and passed the "familiar" or whatever you want to call it along to the others. Since then....well.