EURYALE
the name of the three sisters known as the Gorgons; her name means Wide-Wanderer.
The Gorgons, with the exception of Medusa, were immortal and hideous to behold; Euryale and her two sisters had snakes on their heads, about their wrists and around their waists. Euryale and her sister, Sthenno, gave chase to Perseus after he beheaded Medus
The Gorgons were the daughters of Phoreys and Ceto and sisters of the Graiae.
From: The Theogony of Hesiod
(ll 270-294) And
again, Ceto bare to Phoreys the fair-cheeked Graiae, sisters grey
from their birth: and both deathless gods and men who walk on
earth call them Graiae, Pemphredo well-clad, and saffron-robed
Enyo, and the Gorgons who dwell beyond glorious Oceanus in the
frontier land towards Night where are the clear-voiced
Hesperides, Sthenno, and Euryale, and Medusa who suffered a
woeful fate: she was mortal, but the two were undying and grew
not old. With her lay the Dark-haired One in a soft meadow amid
spring flowers. And when Perseus cut off her head, there sprang
forth great Chrysaor and the horse Pegasus who is so called
because he was born near the springs (pegae) of Oceanus; and that
other, because he held a golden blade (aor) in his hands. Now
Pegasus flew away and left the earth, the mother of flocks, and
came to the deathless gods: and he dwells in the house of Zeus
and brings to wise Zeus the thunder and lightning. But Chrysaor
was joined in love to Callirrhoe, the daughter of glorious
Oceanus, and begot three-headed Geryones. Him mighty Heracles
slew in sea-girt Erythea by his shambling oxen on that day when
he drove the wide-browed oxen to holy Tiryns, and had crossed the
ford of Oceanus and killed Orthus and Eurytion the herdsman in
the dim stead out beyond glorious Oceanus.