What is a TrustBank in the US?

BANK FIVE NINE 10 Bank of Hydro 8 Canandaigua National Trust Company of Florida 5 CENTURY Bank 3 COMMERCIAL Bank OF TX National Association 10 Farmers & Drovers Bank 4 FIRST DAKOTA National Association National Bank 5 First Enterprise Bank 1 First National Bank of Allendale 1 First National Bank of Williamson 3 Georgia Community Bank 12 Hardin County Bank 5 Hometown Bank 10 NICOLET National Association National Bank 11 NORTHERN B&TC 4 Portage County Bank 4 PS Bank 29 SECURITY Bank 14 State Bank of Jeffers 3 Tower Community Bank 7