Role-playing games often use a common set of creatures that are easily recognizeable and have pre-determined traits. Most are based on mythology in some form or other. The Dungeons & Dragons Monster Manual contains many of these as well.
... are 5,316 households out of which 43.7% have children under the age of 18 living with them, 70.4% are married couples living together, 9.9% have a female householder ...