Accountants know who he was. He was a pal of Leonardo, and the inventor of double-entry bookkeeping.
He wrote treatises on chess, math, and other things too. Imagine what sort of website he could have had, had he only invented the intertunnels too. Everybody knows that Sippican invented the intertunnels.
Double entry sounds like tax cheating, but it is not. It is about credits and debits. (It does not refer to the private, personal books for cash receipts that many unscupulous Lefties use to dodge Uncle Sam and rip off their neighbors.)
Image is Luca Pacioli, b. c. 1445.