What is "ratigan"

Ratigan is a surname. Notable people with the surname include:

• William Ratigan (1910–1984), American author
• Dylan Ratigan (1972–present), American television show host
  • The Dylan Ratigan Show, broadcast on MSNBC

• Professor Ratigan, a character from the children's book Basil of Baker Street
  • Ratigan, a character from the animated film The Great Mouse Detective, based on the book