Renoir explained it when JVP EXPOSED him.

cheers

>>Just FYI...
>>
>>I have talked to Michel about becoming a PUTM and we have agreed that the official "Renoir Vandalet" will now become the official "Jay Johengen." I will still sign messages as Renoir, but all other information now reflects my given name.
>>
>>Regards, Renoir
>
>What made you choose an alias, so different from your given name?