Proper noun
Hyacinthus
(Greek mythology) A Spartan youth loved and accidentally killed by Apollo. The flower hyacinth sprang from his blood.
Apollo is said to be filled with grief: out of Hyacinthus' blood, Apollo created a flower named after him as a memorial to his death, and his tears stained the flower petals with the interjection αἰαῖ main, meaning alas. Source: Internet
The pair was practicing throwing the discus when a discus thrown by Apollo was blown off course by the jealous Zephyrus and struck Hyacinthus in the head, killing him instantly. Source: Internet