Meaning A girl's name of Greek origin, it means "Diminutive of Sybil: Prophetess; oracle." Origin of Sibby Greek +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Sibby Similar Names Sib Sibbie Sibella Sibyl Sybella Sibilla Sybilla Cassandrea Cassaundra Sybyl Year by Year Popularity of Sibby