It has been claimed that Nero (Nrn Qsr) was the 666 beast of Rev 13:18.

By the rules of Hebrew gematria, a “final” has a different numeric value than its first occurrence. A “final” nun (as in Nrn) has the numeric value of 700 by itself, so this eliminates Nero as being the 666 beast.

God does not state the language to be used to “count the number”. Rev 13:18

What other numerical “suspect” do the Reformed provide and what language do they use to arrive at that sum for that suspect?
Thank you.