It depends where you look, some things will tell you different things..
we got it from here;
The boy's name Genesis \
ge-ne-
sis\, also used as girl's name Genesis, is of Greek origin, and its meaning is "origin, beginning". Biblical: the first book in the Old Testament, and tells of the story of the creation of the world.
Genesis has 4 variant forms: Gennesis, Ginesis, Jenesis and Jennesis.
The girl's name Omega \o-me-
ga\ is pronounced oh-MAY-gah. It is of Greek origin, and its meaning is "the end". The last letter in the Greek alphabet. Suitable for the youngest child.
Baby names that sound like Omega are Amica, Amika and Jameka. Other similar baby names are Olga, Oma, Omyra and Omeira.