iron(II) : 
Ferrous = https://en.wikipedia.org/wiki/Ferrous
iron(III) :Ferric = https://en.wikipedia.org/wiki/Ferric
Ferrous = https://en.wikipedia.org/wiki/Ferrousiron(III) :
Ferric = https://en.wikipedia.org/wiki/FerricFerrous = https://en.wikipedia.org/wiki/FerrousFerric = https://en.wikipedia.org/wiki/Ferric