To give you the best possible answer, I need more information. Please tell me:
* What time period are you interested in? Were they individuals from the same era, or vastly different periods?
* What field or area were they associated with? Were they politicians, artists, scientists, or something else entirely?
* Do you have any other details about them? Perhaps a location, a specific accomplishment, or a relationship to another person.
With more details, I can help you identify Walter Murray and Thomas Kean and provide information about their lives and achievements.