"Perhaps the simplest is that used for naming binary substances. This set of rules leads to a name such as iron dichloride for the substance FeCl2; this name involves the juxtaposition of element names (iron, chlorine), their ordering in a specific way (electropositive before electronegative), the modification of an element name to indicate charge (the 'ide' ending designates an elementary anion and, more generally, an element being treated formally as anion), and the use of the numerical prefix 'di' to indicate composition."
Taken from IUPAC Functions and Methods of Chemical Nomenclature (March 2004) - Ingorganic Chemistry.
So naming as Iron Dichloride is perfectly acceptable, as the Di indicates the II.
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