From Longman Dictionary of Contemporary Englishbookplatebook‧plate /ˈbʊkpleɪt/ noun [countable] TCNa decorated piece of paper with your name on it, that you stick in the front of your books
Examples from the Corpus
bookplate• There are some 50 private archives created by past heralds, miscellaneous family papers, as well as seals and bookplate collections.• There are probably a number of books with the Coats bookplate, many in Gaelic, to be found in private collections.• One of the attractions of bookplate collecting is that it can be relatively inexpensive.• Much more important are the inscription and the bookplates of the Bernard family. 