14 Ill. Adm. Code 150.455
Surnames
Section 150
Section 150.455Â Surnames
A surname shall be considered a
"word". Where a corporate name consists of a surname without a given
name or initials, it is treated in the same manner as other words for
application of this subpart. A person may use his or her own name in a corporate
name, but the corporate name must still be distinguishable from other corporate
names.