Their number is variously reported as from two to eight.
In the Odyssey, Homer says nothing of their origin or names, but gives the number of the Sirens as two.
Later writers mention both their names and number: some state that there were three, Peisinoe, Aglaope and Thelxiepeia or Parthenope, Ligeia, and Leucosia; Apollonius followed Hesiod gives their names as Thelxinoe, Molpe, and Aglaophonos; Suidas gives their names as Thelxiepeia, Peisinoe, and Ligeia; Hyginus gives the number of the Sirens as four: Teles, Raidne, Molpe, and Thelxiope; Eustathius states that they were two, Aglaopheme and Thelxiepeia; an ancient vase painting attests the two names as Himerope and Thelxiepeia.
Their individual names are variously rendered in the later sources as Thelxiepeia/Thelxiope/Thelxinoe, Molpe, Himerope, Aglaophonos/Aglaope/Aglaopheme, Pisinoe/Peisinoë/Peisithoe, Parthenope, Ligeia, Leucosia, Raidne, and Teles.

Aglaopheme (Αγλαοφήμη), Aglaophonos (Αγλαόφωνος), or Aglaope (Αγλαόπη), all to be translated as "with lambent voice"), attested as a daughter of Achelous and Melpomene.

Leucosia (Λευκωσία): Her name was given to the island opposite to the Sirens' cape.
Her body was found on the shore of Poseidonia.

Ligeia (Λιγεία): She was found ashore of Terina in Bruttium (modern Calabria).

Molpe (Μολπή), another daughter of Achelous and Melpomene.

Parthenope (Παρθενόπη): Her tomb was presented in Naples and called "constraction of sirens".

Peisinoe (Πεισινόη) or Peisithoe (Πεισιθόη), daughter of Achelous and Melpomene.

Thelxiepeia (Θελξιέπεια) or Thelxiope (Θελξιόπη) "eye pleasing"), daughter of Achelous and Melpomene.
Their number is variously reported as from two to eight. In the Odyssey, Homer says nothing of their origin or names, but gives the number of the Sirens as two. Later writers mention both their names and number: some state that there were three, Peisinoe, Aglaope and Thelxiepeia or Parthenope, Ligeia, and Leucosia; Apollonius followed Hesiod gives their names as Thelxinoe, Molpe, and Aglaophonos; Suidas gives their names as Thelxiepeia, Peisinoe, and Ligeia; Hyginus gives the number of the Sirens as four: Teles, Raidne, Molpe, and Thelxiope; Eustathius states that they were two, Aglaopheme and Thelxiepeia; an ancient vase painting attests the two names as Himerope and Thelxiepeia. Their individual names are variously rendered in the later sources as Thelxiepeia/Thelxiope/Thelxinoe, Molpe, Himerope, Aglaophonos/Aglaope/Aglaopheme, Pisinoe/Peisinoë/Peisithoe, Parthenope, Ligeia, Leucosia, Raidne, and Teles.
Aglaopheme (Αγλαοφήμη), Aglaophonos (Αγλαόφωνος), or Aglaope (Αγλαόπη), all to be translated as "with lambent voice"), attested as a daughter of Achelous and Melpomene.
Leucosia (Λευκωσία): Her name was given to the island opposite to the Sirens' cape. Her body was found on the shore of Poseidonia.
Ligeia (Λιγεία): She was found ashore of Terina in Bruttium (modern Calabria).
Molpe (Μολπή), another daughter of Achelous and Melpomene.
Parthenope (Παρθενόπη): Her tomb was presented in Naples and called "constraction of sirens".
Peisinoe (Πεισινόη) or Peisithoe (Πεισιθόη), daughter of Achelous and Melpomene.
Thelxiepeia (Θελξιέπεια) or Thelxiope (Θελξιόπη) "eye pleasing"), daughter of Achelous and Melpomene.
Siren (mythology)