Did Ptolemy have a birth name? Or better, was Ptolemy his fake or real name?

Questions related to this:

1)If it was real name, did he have some fake name and how did Bart discover his real name?

2)If it was fake name, then what was his real name?

3)If he didn´t have fake name, then how could he summon demons spirits?

Thanks and sorry for your time lost answering this.







Just because I want, some smiles:
(Like the synchronized throwing computers)