In Greek mythology, Pierus[pronunciation?] (Ancient Greek: Πίερος Píeros) was the son of Thessalian Magnes. He was the lover of muse Clio and father of Hyacinth in some accounts,[1] and Rhagus[citation needed].
Pierus was loved by muse Clio because Aphrodite had inspired her with the passion, as a punishment for deriding the goddess' own love for Adonis. This was the only myth where Pierus appeared once:[2]