Rosenbach, Abraham (Simon Wolf) (1876–1952)

US book dealer and collector. He helped assemble the volumes at the core of such institutions as the Huntington Library, the Widener Library, the Folger Shakespeare Library, and the Harkness collection (now in the Library of Congress). He also became one of the world's major collectors of books.

He was born in Philadelphia. After earning his PhD at the University of Pennsylvania, he joined his brother, Philip Rosenbach, in the antique business in 1902, soon branching out to sell rare books and manuscripts. He owned such items as James Joyce's manuscript copy of Ulysses. He wrote such works as A Book Hunter's Holiday 1936.