WordNet sense 1 (United States meat-packer who began the use of refrigerated railroad cars (1839-1903)):

Gustavus Franklin Swift

WordNet sense 2 (an English satirist born in Ireland (1667-1745)):

Dean Swift, Jonathan Swift

WordNet sense 3 (common western lizard; seen on logs or rocks):

blue-belly, western fence lizard, Sceloporus occidentalis

WordNet sense 4 (moving very fast):

fleet