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Parent article: List of gay, lesbian or bisexual people ; Siblings:. This is a partial list of famous people who were or identify themselves as gay , lesbian or bisexual. Famous people who are simply rumored to be gay, lesbian or bisexual, are not listed, but since it is difficult to provide proof of a historical person's sexuality, they may be included where there are reliable sources. The definition of sexual orientation has changed greatly over time and the word "gay" wasn't used to describe sexual orientation until the 20th century. A number of different classification schemes have been used to describe sexual orientation since the midth century. Much of the research about sexual orientation has failed to define the term at all, making it difficult to reconcile the results of different studies.