) was an Italian composer

Composer

A composer is a person who creates music, either by musical notation or oral tradition, for interpretation and performance, or through direct manipulation of sonic material through electronic media...

 and singer. She was the youngest daughter of composer Giulio Caccini

Giulio Caccini

Giulio Caccini , also known as Giulio Romano, was an Italian composer, teacher, singer, instrumentalist and writer of the very late Renaissance and early Baroque eras. He was one of the founders of the genre of opera, and one of the single most influential creators of the new Baroque style...

 and singer Lucia Gagnolanti. Her mother died when she was very young. She was the sister of Francesca Caccini

Francesca Caccini

Francesca Caccini was an Italian composer, singer, lutenist, poet, and music teacher of the early Baroque era. She was the daughter of Giulio Caccini, and was one of the best-known and most influential female European composers between Hildegard of Bingen in the 12th century and the 19th century...

, also a composer and singer, and Pompeo Caccini, a singer. Due to the level of musical talent in her family, Settimia started her musical education at an early age, going on to be a successful singer, and composer in her own right.