About Jay Sebring
Thomas John Kummer, known professionally as Jay Sebring, was an American celebrity hair stylist, and the founder of the hairstyling corporation Sebring International. Sebring was murdered by members of the Manson Family along with his ex-girlfriend Sharon Tate. On Wednesday, August 13, funerals for Tate and Sebring took place the same day; the funerals were scheduled several hours apart (first for Tate and then Sebring) to allow mutual friends to attend both. He promptly "invented a whole new way of cutting men's hair".
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.