HB 2130, which went into effect March 7, 2014, restricts the use of the words “bank” and/or “trust” (including derivative, plural or compound forms of these words) in corporate names. See the full bill text at the link below.
http://coolice.legis.iowa.gov/linc/85/external/govbills/HF2130.pdf
Iowa – Use of “Bank” or “Trust” in a Corporate Name