Urania.

Urania (Οὐρανία) (Ouranía) was the Muse of astronomy in Greek mythology. The globe was the symbol of this goddess.

Zeus was her father and Mnemosyne was Urania's mother.

Also, she had several siblings: Polyhymnia, Euterpe, Calliope, Clio, Erato, Thalia, and etc.

Apollo (Ἀπόλλων) (Apollōn), Hermes (Ἑρμῆς), and Amphimarus (Ἀμφίμαρος) were Urania's husbands.

Linus (Λῖνος) (Linos) and Hymen (Ὑμήν) (Humḗn) were their sons.

Euterpe.

Euterpe (Εὐτέρπη) was the Muse of lyric poetry in Greek mythology. Double flute was her symbol.

Zeus was Euterpe's father and Titaness Mnemosyne was her mother.

Euterpe had several sisters: Calliope, Clio, Polyhymnia, Urania, Erato, Thalia, Terpsichore, and Melpomene.

Strymon (Στρυμών) and Apollo were her consorts. Rhesus (Ῥῆσος) (Rhêsos) and Orpheus were Euterpe's sons.

Triptolemus.

Triptolemus (Τριπτόλεμος) (Triptólemos), also known as Buzyges (Βουζύγης) (Bouzýgēs) was involved in agriculture in Greek myths and legends.

Oceanus and Gaia (Γαῖα) (Gaîa), or Celeus (Κελεός) (Keleós) and Metanita (Μετάνειρα ) (Metáneira), or Polyhymnia were his parents. Orpheus (Ὀρφεύς), Demophon (Δημοφῶν) (Δημοφόων), and Callidice (Καλλιδίκη) (Kallidíkē) were brothers and sister of Triptolemus.

He met with Demeter (Δημήτηρ) (Dēmḗtēr) and Persephone (Περσεφόνη) (Persephónē).

Polyhymnia.

Polyhymnia (Πολυύμνια) was the Muse of poetry and dance in Greek mythology.

Zeus was her father and Mnemosyne (Μνημοσύνη) was her mother.

Calliope (Καλλιόπη) (Kalliópē), Urania (Οὐρανία) (Ouranía), Clio (Κλειώ), Euterpe (Εὐτέρπη), Erato (Ἐρατώ), Terpsichore (Τερψιχόρη), Thalia (Θάλεια), and Melpomene (Μελπομένη) (Melpoménē) were Polyhymnia's siblings.

Orpheus (Ὀρφεύς) and Triptolemus (Τριπτόλεμος) (Triptólemos) were her sons.

There are different arts about Polyhymnia.