Michael Cronan, a San Francisco-based graphic designer and marketing executive who placed his stamp on popular culture when he created the brand names TiVo and Kindle, died on Tuesday in Berkeley, Calif. He was 61. The cause was colon cancer, said his wife, Karin Hibma, with whom he founded the marketing firm Cronan in the early 1980s. Mr. Cronan, who studied art in college, had many corporations
