You most likely mean Fe3+. This is not a compound, it is a monotaomic ion of the element iron.
Because it carries a positive charge it is not a substance in its own right but is a component of some ionic compounds.
It is called the iron III ion.
The name for the ionic compound FeO is iron(II) oxide.
The ionic compound name for SCI4 is sulfur tetrachloride.
The name of the ionic compound Cs2S is cesium sulfide.
The name for the ionic compound MgOH2 is magnesium hydroxide.
Sodium bromite is the name of the ionic compound NaBrO2.
Iron(III)Chloride
The name for the ionic compound FeO is iron(II) oxide.
The name of the ionic compound Cu3PO3 is copper(I) phosphite.
Sodium bromite is the name of the ionic compound NaBrO2.
The name of the ionic compound Cs2S is cesium sulfide.
The name for the ionic compound MgOH2 is magnesium hydroxide.
The ionic compound name for SCI4 is sulfur tetrachloride.
The name of the ionic compound Li2S is lithium sulfide.
There is no such thing as FeCI3 FeCl3 (with a lowercase L) is iron III chloride.
Potassium perchlorate is the name of the ionic compound KBrO4.
The name of the ionic compound PbSO4 is lead(II) sulfate.
The ionic compound name for NH4F is ammonium fluoride.