The
feminine goddess par excellence in ancient
Egypt, Hathor was a pre-Dynastic goddess who gained
enormous popularity early on.
Her
name is translated as "the House of Horus", which may
be a reference to her as the embodiment of the sky in
her role of the Celestial Cow, being that which surrounds
the decidedly sky-oriented hawk-deity, Horus,
when he takes wing. If Horus was the god associated with
the living king, Hathor was the god associated with the
living queen.
In
earlier periods she was most often depicted as a full
cow with the sundisk between her horns or as a slender
woman wearing the horns-and-a-sundisk headdress (which
may or may not have a uraeus upon it). She was also shown
as a hippopotamus, a falcon, a cobra, or a lioness, however
these were not as frequent as the woman or the cow. While
there are some depictions of Hathor as a woman with a
cow's head, this is mainly found only in the later periods.

Hathor's
symbology included such items as sistra (a type of rattle),
the horns-and-sundisk headdress (in much later times incorporated
into the attire of Isis), the menat
(a type of ritual necklace that may have been used for
percussive music), and mirrors. Many ancient mirrors and
sistra decorated with smiling, often nude Hathors on them
have been uncovered over the years, and Hathor's visage
(with cow ears) commonly appeared at the top of stone
columns in Egyptian temples, many of which can still be
seen today.
Her
cult flourished in Ta-Netjer ("Land of God" -- modern
day Dendera) in Upper Egypt and her priests included both
men and women, many of whom were dancers, singers, or
musicians as the arts fell under Hathor's domain. Priests
of Hathor were also oracles and midwives, and people could
go to some temples of Hathor to have their dreams interpreted
by her priests. Hathor's protection was invoked over children
and pregnant women.
Hathor,
as the Eye of Ra, "becomes" Sakhmet
in the story "The Destruction of Mankind". Engraved into
one of the shrines of Tutankhamen's tomb, the story tells
how Hathor, at the request of her father (Ra), turns into
Sakhmet in order to punish humans for transgressing against
him. When she nearly wipes out all of humanity, Ra tries
to stop her and, failing in that, contrives to get her
drunk, whereupon she immediately forgets what it was she
was doing and goes back to being Hathor.
Hathor
also appears as a minor character in "The Contendings
of Horus and Seth". Her father
(Ra) falls into a black mood so Hathor sets forth to cheer
him up. Removing her clothing, she dances around his throne
until he smiles again.
An
additional myth, sometimes called "The Distant Goddess",
tells of how Hathor became angry with Ra and wandered
away from Egypt. Great sadness falls over the land and
Ra, lost without his Eye, decides to fetch her back. However,
Hathor has now become a deadly wild cat who destroys all
that approaches her, and so no man or god will volunteer
to go get her.
Thoth
eventually agrees to lure her back and, dressed in disguise,
manages to coax the angry goddess to return to Egypt by
telling her stories. Back in her homeland, she bathes
in the Nile and once again settles into her normally gentle
demeanor, but not before the waters turn red from the
effort of cooling her rage. In some versions of this story
it is Tefnut, not Hathor, who
wanders away from Egypt, and Shu,
not Thoth, who brings her back.
Hathor
is associated with numerous other Egyptian goddesses.
Her connections with Bastet helped
to "soften up" that deity's visage, and as discussed previously
Hathor was the other side of the Sakhmet
coin. Hathor also seems to have absorbed many of the properties
of Bat (another pre-Dynastic cow
goddess), who is depicted at the top of the famous Narmer
palette overseeing the events detailed therein.
Hathor
is also known as the "Lady to the Limit" ("limit" meaning
the edges of the known universe) and the "Lady of the
West"; her image is sometimes seen on funerary depiction
as she stands behind Osiris, welcoming the dead to their
new home.
Other
titles of Hathor include the "Divine (or Celestial) Cow",
"Mistress of Heaven", and "Lady of Gold", the last two
of which were sometimes attributed to the queens of ancient
Egypt. Hathor was also known as the "Lady of Greenstone
and Malachite" due to her being regarded as a goddess
of the desert fringes where such mines existed.
The
Greeks called Hathor by the name of their goddess, Aphrodite.
In the very late stages of Egyptian religion (over two
millennia after Hathor had first appeared) she became
almost totally absorbed into Isis (who acquired, aside
from Hathor's headdress, the sistrum as well), resulting
in frequent mistaken identity between the two. There are,
however, subtle differences. When Isis is shown with the
horns she is also (usually) shown with either the vulture
headdress (which was associated with Mut,
a goddess of Thebes), winged, or wearing a multi-colored
feathered dress. There are of course exceptions (such
as in the tomb of Horemheb), in which case knowledge of
hieroglyphs is necessary to discern which goddess is which.
At
the temple of Nefertari at Abu Simbel, Nefertari is shown
as Hathor in many places, and Ramses II (the husband of
Nefertari) is shown in one sanctuary receiving milk from
Hathor the cow.
When
a child was born in Egypt, seven Hathors (somewhat like
European fairy godmothers) would appear to "speak with
one mouth" and determine the child's fate.
Hathor's
own child was Ihy, who was worshipped in Dendera with
her and Horus-Behdety. Like his mother, Ihy was a god
of music and dancing, and was always depicted as a child
bearing a sistrum.
The
name of Hathor in hieroglyphs: 
Source(s):