(1) Robin Patricia Williams (b. 1953, American, female), computer books.
(2) Robin McLaurin Williams (1951-2014, American, male), actor.
(3) Robin Williams (British, male, often co-writes with Robin Templar Williams), gardening books.
(4) Robin Williams, b. 1923, Welsh author
(5) Robin Williams, author of A Vancouver boyhood
(6) Robin Williams, American folk musician