Petrie 's hypothesis has been thoroughly disproven by modern analyses of the Turin canon however .
Nitocris is now known to originate from the names of the real ruler Netjerkare Siptah .
Petrie 's hypothesis has been thoroughly disproven by modern analyses of the Turin canon however , and Nitocris is now known to originate from the names of the real ruler Netjerkare Siptah .