For me its just a name I created for my first diary when I was in the seventh grade,but the world is huge and everything and anything has a meaning so I opened google and wrote 'Harpy' and clicked on the first link 'Wikipedia'; What I discovered is that :
[ In Greek mythology, a harpy ("snatcher", from Latin: harpeia, originating in Greek: ἅρπυια, harpūia) was one of the winged spirits best known for constantly stealing all food from Phineus. ]
Here's a picture of a Harpy:
Mythology: Greek
Grouping: Legendary creature
Sub-grouping: Hybrid
Grouping: Legendary creature
Sub-grouping: Hybrid
A medieval depiction of a harpy as a bird-woman.
This information is copied from Wikipedia.
For more Information : http://en.wikipedia.org/wiki/Harpy