List of Famous people named Leonard

Leonard Sylvan Peikoff is a Canadian-American philosopher. He is an Objectivist and was a close associate of Ayn Rand, who designated him heir to her estate after her death. He is a former professor of philosophy and host of a nationally syndicated radio talk show. He co-founded the Ayn Rand Institute (ARI) in 1985 and is the author of several books on philosophy.

Leonard X. Bosack is a co-founder of Cisco Systems, an American-based multinational corporation that designs and sells consumer electronics, networking and communications technology, and services. His net worth is approximately $200 million. He was awarded the Computer Entrepreneur Award in 2009 for co-founding Cisco Systems and pioneering and advancing the commercialization of routing technology and the profound changes this technology enabled in the computer industry.

Leonard Kleinrock is an American computer scientist. A professor at UCLA's Henry Samueli School of Engineering and Applied Science, he made several important contributions to the field of computer science, in particular to the theoretical foundations of data communication in computer networking.

Leonard S. Riggio is a retired American businessman and entrepreneur. He served as executive chairman of book store chain Barnes & Noble and was its largest shareholder from 1971 until the sale of the company to the hedge fund Elliott Advisors in 2019. Under his leadership the company expanded significantly from a single retail location on 105 Fifth Avenue, New York to a nationwide chain with 600+ stores, which it did with acquisitions and mergers of competing chain stores.