Definitions of Todd:

• noun:   fictional character in a play by George Pitt; a barber who murdered his customers
• noun:   Scottish chemist noted for his research into the structure of nucleic acids (born in 1907)
• name:  A male given name (very common: 1 in 469 males; popularity rank in the U.S.: #88)
• name:  A surname (common: 1 in 3333 families; popularity rank in the U.S.: #368)