See:

• The Germanic tribe known as the Franks;
• One of various currencies known as Francs;
• Franking as a postal device;
• Frankfurter;
• Frank, the LiveJournal.com mascot

Geographical names:

• Frank, Alberta
• Frank Township, North Carolina ;
• Frank, West Virginia ;

People whose surname was 'Frank' or similar:

• Anne Frank
• Ilya Frank, physicist (1958 Nobel laureate)
• Robert Frank, photographer
• César Franck, composer
• James Franck, physicist (1925 Nobel laureate)

Pop-cultural entities:

• Frank is also an album by the New Wave group Squeeze.
• Frank and Ernest is a long-running syndicated cartoon
• Frank , is a character in Sesamstraat
• Frank Magazine is a Canadian scandal sheet.
• Frank is also a character in the Movie Donnie Darko.

Also, frank means free in the original Germanic language, and still has that meaning (free) in Dutch, German and English, albeit a bit archaic.