Sibylla of Acerra (1153–1205) was Queen of Sicily as the wife of King Tancred.[1] After Tancred's death, she was regent in 1194 for their son, King William III. She was the sister of Count Richard of Acerra.
- ^ The New Cambridge Medieval History: Volume 4, C.1024-c.1198, Part II, ed. David Luscombe and Jonathan Riley-Smith, (Cambridge University Press, 2004), 760.