Lamia (daughter of Poseidon)
In Greek mythology, Lamia was a daughter of Poseidon, and mother, by Zeus, of the Libyan Sibyl. It was perhaps this Lamia who, according to Stesichorus, was the mother of Scylla.
...
Wikipedia
In Greek mythology, Lamia was a daughter of Poseidon, and mother, by Zeus, of the Libyan Sibyl. It was perhaps this Lamia who, according to Stesichorus, was the mother of Scylla.